Quanlong Huang created IMPALA-11848:
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Summary: Add build option to generate code coverage report after
running tests
Key: IMPALA-11848
URL: https://issues.apache.org/jira/browse/IMPALA-11848
Project: IMPALA
Issue Type: Task
Components: Infrastructure
Reporter: Quanlong Huang
We need an option in buildall.sh to generate code coverage reports after
running the tests. So we can integrate it with Jenkins to get regular code
coverage reports. Some background about existing works:
h4. Java code coverage report
We have integrated Jacoco to generate code coverage report for FE tests
(IMPALA-3572), e.g. one can manually run a FE test and get the reports by
{code:java}
(pushd fe && mvn test -Dtest=PlannerTest -DcodeCoverage){code}
The html reports are generated in ${IMPALA_FE_TEST_COVERAGE_DIR}.
To get the FE code coverage report for e2e and custom-cluster tests, we can
start the impala cluster with a java agent provided by Jacoco, e.g.
{code:java}
jvm_args="-javaagent:/home/quanlong/.m2/repository/org/jacoco/org.jacoco.agent/0.8.8/org.jacoco.agent-0.8.8-runtime.jar=destfile=/home/quanlong/workspace/Impala/logs/fe_tests/coverage/jacoco.exec,jmx=true"{code}
The Jacoco agent doesn't dump the exec data when Impala process is killed
(probably due to JVM not exit gracefully). We need to use jconsole to trigger
the dump operation (via JMX beans). Then generate the report base on the exec
data.
We need to make this automatic, especially for custom-cluster tests that will
restart the cluster at the begining.
[https://www.jacoco.org/jacoco/trunk/doc/agent.html]
[https://www.jacoco.org/jacoco/trunk/doc/api/org/jacoco/agent/rt/IAgent.html]
[https://www.jacoco.org/jacoco/trunk/doc/cli.html]
h4. C++ code coverage report
buildall.sh has an option, -codecoverage, to build with gcov. We can get the
coverage data for C++ codes when the process exit. Then use
"bin/coverage_helper.sh -report" to generate the html reports.
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