----- Original Message -----
> From: "Lance Richardson" <lrich...@redhat.com>
> To: dev@openvswitch.org
> Sent: Wednesday, March 2, 2016 4:40:44 PM
> Subject: [ovs-dev] [RFC 0/4] testsuite code coverage usability fixes, lcov
>
> This series addresses usability issues when executing the testsuite
> on builds configured with --enable-coverage and introduces basic
> support for generating HTML code coverage reports via lcov.
>
> Currently when running "make check" on a build with coverage enabled,
> nearly all test cases will fail due to unexpected messages on stderr
> of the form:
> profiling:...*.gcda: Merge mismatch for function *
>
> This happens because daemons created for each test case are killed
> at the end of the test case, and if a daemon happens to be killed
> while in the middle of writing coverage information to a gcda file,
> the gcda file will be corrupted.
>
> These errors can be avoided by ensuring that deamons have fully
> exited when given the "exit" command before executing any cleanup
> actions.
>
> Lance Richardson (4):
> tests: Make OVS_APP_EXIT_AND_WAIT() wait for process termination
> tests: make as() function as documented
> tests: consistently use OVS_APP_EXIT_AND_WAIT() for daemon termination
> tests: enable basic lcov code coverage reporting support
>
If anyone would like to try this (and perhaps send a "Tested-by" :-)),
it's fairly straightforward.
The lcov package is required, so "yum install lcov", "apt-get install lcov",
etc. as appropriate for your system. Then:
git clone https://github.com/openvswitch/ovs.git ovs-test
cd ovs-test/
wget https://patchwork.ozlabs.org/patch/591138/raw/ -O - | patch -p1
wget https://patchwork.ozlabs.org/patch/591139/raw/ -O - | patch -p1
wget https://patchwork.ozlabs.org/patch/591140/raw/ -O - | patch -p1
wget https://patchwork.ozlabs.org/patch/591141/raw/ -O - | patch -p1
./boot.sh
./configure --enable-coverage
make check-lcov
firefox tests/lcov/index.html
At this point the coverage data can be browsed using your favorite web
browser.
Lance
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