config: runtime: add gcov reset & upload "sub-templates"

Enabling code coverage for a given test job requires 2 actions:
* reset GCOV so we only record coverage data during the test itself
* pack and upload artifacts to online storage after the test completes

The latter is implemented by POSTing the artifact to the storage server,
providing the artifact name and URL as a LAVA test result using the
following format:

  artifact-upload:<artifact name>:<artifact URL>

This allows the pipeline to add the uploaded artifact(s) to the
corresponding node so the information can be easily re-used at a later
stage.

As we'll enable coverage in many different tests, turn those actions
into separate LAVA test definitions that can then be (conditionally)
included by each test template when needed.

Signed-off-by: Arnaud Ferraris <[email protected]>

Author: a-wai

config/runtime/util/gcov-reset.jinja2

@@ -0,0 +1,12 @@
+    - from: inline
+      repository:
+        metadata:
+          format: Lava-Test Test Definition 1.0
+          name: reset-gcov
+          description: Reset GCOV data
+        run:
+          steps:
+          - GCOV_RESET="/sys/kernel/debug/gcov/reset"
+          - if [ -f ${GCOV_RESET} ]; then echo 1 > ${GCOV_RESET}; fi
+      name: reset-gcov
+      path: inline/reset-gcov.yaml

config/runtime/util/gcov-upload.jinja2

@@ -0,0 +1,42 @@
+    - from: inline
+      name: upload
+      path: inline/upload.yaml
+      repository:
+        metadata:
+          description: GCOV artifacts upload
+          format: Lava-Test Test Definition 1.0
+          name: upload
+          environment:
+            - lava-test-shell
+          os:
+          - debian
+        run:
+          steps:
+          - GCDA=/sys/kernel/debug/gcov
+          # Bail out if $GCDA doesn't exist (as GCOV is likely not enabled)
+          - test -d ${GCDA} || exit 0
+          - TEMPDIR=$(mktemp -d)
+          - UPLOAD_PATH="{{ node.name }}-{{ node.id }}"
+          - UPLOAD_NAME="gcov.tar.gz"
+          # Retrieve GCOV artifacts
+          # Taken from https://www.kernel.org/doc/html/v6.12/dev-tools/gcov.html#appendix-b-gather-on-test-sh
+          - find $GCDA -type d -exec mkdir -p $TEMPDIR/\{\} \;
+          - find $GCDA -name '*.gcda' -exec sh -c 'cat < $0 > '$TEMPDIR'/$0' {} \;
+          - find $GCDA -name '*.gcno' -exec sh -c 'cp -d $0 '$TEMPDIR'/$0' {} \;
+          - tar czf gcov.tar.gz -C $TEMPDIR sys
+          - rm -rf $TEMPDIR
+          # Use set +x so we can don't echo secret tokens in the logs
+          - set +x
+          - . /lava-${LAVA_JOB_ID}/secrets
+          # FIXME: this should actually be part of the rootfs
+          - apt-get -q update
+          - apt-get -q install -y curl
+          - >-
+            lava-test-case "artifact-upload:coverage_data:{{ storage_config.base_url }}/${UPLOAD_PATH}/${UPLOAD_NAME}"
+            --shell curl -X POST {{ storage_config.base_url }}/upload
+            -H "Authorization: Bearer ${UPLOAD_TOKEN}"
+            -F "file0=@${UPLOAD_NAME}"
+            -F "path=${UPLOAD_PATH}"
+
+secrets:
+  UPLOAD_TOKEN: {{ storage_config.name }}-token