RFR: 8317802: jmh tests fail with Unable to find the resource: /META-INF/BenchmarkList after JDK-8306819 [v3]

[Magnus Ihse Bursie]

On Tue, 10 Oct 2023 17:09:51 GMT, Jaikiran Pai <jpai at openjdk.org> wrote:

>> Can I please get a review of this change which proposes to fix jmh test launch failures noted in https://bugs.openjdk.org/browse/JDK-8317802?
>> 
>> jmh apparently relies on annotation processors during compilation of a benchmark. When annotation processing is disabled, the generated benchmark jar is unusable when the benchmark is launched and fails with:
>> 
>> 
>> Exception in thread "main" java.lang.RuntimeException: ERROR: Unable to find the resource: /META-INF/BenchmarkList
>> 	at org.openjdk.jmh.runner.AbstractResourceReader.getReaders(AbstractResourceReader.java:98)
>> 	at org.openjdk.jmh.runner.BenchmarkList.find(BenchmarkList.java:124)
>> 	at org.openjdk.jmh.runner.Runner.internalRun(Runner.java:252)
>> 	at org.openjdk.jmh.runner.Runner.run(Runner.java:208)
>> 	at org.openjdk.jmh.Main.main(Main.java:71)
>> 
>> After the integration of https://bugs.openjdk.org/browse/JDK-8306819 recently in JDK mainline, `javac` no longer runs annotation processors by default. These jmh tests that are compiled as part of the JDK build will now have to enable annotation processing explicitly.
>> 
>> The commit in this PR enables annotation processing by setting `-proc:full` (implying run annotation processors as well as compile the files) when compiling the benchmarks.
>> 
>> I tested this change locally. Without this change, the following command fails:
>> 
>> 
>> make test TEST="micro:java.lang.ArraysSort"                                                               
>> ...
>> Test selection 'micro:java.lang.ArraysSort', will run:
>> * micro:java.lang.ArraysSort
>> 
>> Running test 'micro:java.lang.ArraysSort'
>> Exception in thread "main" java.lang.RuntimeException: ERROR: Unable to find the resource: /META-INF/BenchmarkList
>> 	at org.openjdk.jmh.runner.AbstractResourceReader.getReaders(AbstractResourceReader.java:98)
>> 	at org.openjdk.jmh.runner.BenchmarkList.find(BenchmarkList.java:124)
>> 	at org.openjdk.jmh.runner.Runner.internalRun(Runner.java:252)
>> 	at org.openjdk.jmh.runner.Runner.run(Runner.java:208)
>> 	at org.openjdk.jmh.Main.main(Main.java:71)
>> Finished running test 'micro:java.lang.ArraysSort'
>> 
>> 
>> 
>> After the change in this PR, the same command works fine and the jmh benchmark is run.
>
> Jaikiran Pai has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Erik's suggestion - move param to new line

Looks good! Thanks for using -processor instead.

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Marked as reviewed by ihse (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/16122#pullrequestreview-1668520274