hostap/tests/hwsim/vm
Jouni Malinen f4bfa2d27f tests: Allow gcov to be used when running test cases within vm
Signed-hostap: Jouni Malinen <j@w1.fi>
2013-12-26 13:37:06 +02:00
..
.gitignore hwsim tests: Add scripts to run in a VM 2013-10-31 11:08:16 +02:00
inside.sh hwsim tests: Handle regdomain requests in vm scripts 2013-12-24 06:49:57 +02:00
kernel-config hwsim tests: Add scripts to run in a VM 2013-10-31 11:08:16 +02:00
README tests: VM test script: Copy gcov data if present 2013-12-07 17:45:12 -08:00
uevent.sh hwsim tests: Handle regdomain requests in vm scripts 2013-12-24 06:49:57 +02:00
vm-run.sh tests: Allow gcov to be used when running test cases within vm 2013-12-26 13:37:06 +02:00

These scripts allow you to run the hwsim tests inside a KVM virtual machine.

To set it up, first compile a kernel with the kernel-config file as the
.config. You can adjust it as needed, the configuration is for a 64-bit
x86 system and should be close to minimal. The architecture must be the
same as your host since the host's filesystem is used.

Install the required tools: at least 'kvm', if you want tracing trace-cmd,
valgrind if you want, etc.

Compile the hwsim tests as per the instructions given, you may have to
install some extra development packages (e.g. binutils-dev for libbfd).

Create a vm-config file and put the KERNELDIR option into it (see the
vm-run.sh script). If you want valgrind, also increase the memory size.

Now you can run the vm-run.sh script and it will execute the tests using
your system's root filesystem (read-only) inside the VM. The options you
give it are passed through to run-all.sh, see there.


--------------------------------------------------------------------------------

Code Coverage Analysis

In order to do code coverage analysis, reconfigure the kernel to include

CONFIG_GCOV_KERNEL=y
CONFIG_GCOV_PROFILE_ALL=y

Note that for gcc 4.7, kernel version 3.13-rc1 or higher is required.

The scripts inside the VM will automatically copy the gcov data out of the
VM into the logs directory. To post-process this data, you'll want to use
lcov and run

cd /tmp/hwsim-test-logs/<timestamp>
lcov -c -d gcov/ > gcov/data
genhtml -o html/ gcov/data

Then open html/index.html in your browser.

Note that in this case you need to keep your build and source directories
across the test run (otherwise, it's safe to only keep the kernel image.)