RFR: 8273928: Use named run ids when problem listing tests [v4]

[Stefan Karlsson]

On Mon, 20 Sep 2021 11:22:40 GMT, Stefan Karlsson <stefank at openjdk.org> wrote:

>> Today when you have multiple jtreg run sections in a test, each run gets an automated id that match the location in the file. For example:
>> Passed: gc/stringdedup/TestStringDeduplicationAgeThreshold.java#id0
>> Passed: gc/stringdedup/TestStringDeduplicationAgeThreshold.java#id1
>> Passed: gc/stringdedup/TestStringDeduplicationAgeThreshold.java#id2
>> Passed: gc/stringdedup/TestStringDeduplicationAgeThreshold.java#id3
>> 
>> The path to the test plus the id can be used to problem lists the test. Say that id3 matches a run done with ZGC, and we need to problem list this test with ZGC, then the problem list would contain:
>> gc/stringdedup/TestStringDeduplicationAgeThreshold.java#id3
>> 
>> The problem is when someone adds a new run section before that, then all the ids will be shifted and #id3 doesn't correspond to the ZGC run anymore. A similar problem occurs if two run sections are swapped.
>> 
>> I propose that we refrain from using the automatically generated ids when problem listing tests. Instead we add explicit ids like this:
>> * @test id=Z
>> 
>> An additional benefit of doing this is that it will be easier to see what was actually run:
>> Passed: gc/stringdedup/TestStringDeduplicationAgeThreshold.java#G1
>> Passed: gc/stringdedup/TestStringDeduplicationAgeThreshold.java#Parallel
>> Passed: gc/stringdedup/TestStringDeduplicationAgeThreshold.java#Serial
>> Passed: gc/stringdedup/TestStringDeduplicationAgeThreshold.java#Z
>> 
>> I've gone through the tests in the HotSpot problem lists + some that affects ZGC. There are probably more tests that would benefit from getting explicit ids, but I started with a small set to begin with.
>
> Stefan Karlsson has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains five additional commits since the last revision:
> 
>  - Merge remote-tracking branch 'origin/master' into 8273928_jtreg_ids
>  - Review 1
>  - Fix TestReferenceClearDuringReferenceProcessing
>  - Remove temporary ProblemList testing
>  - 8273928: Use named run ids when problem listing tests

Thanks for reviewing!

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PR: https://git.openjdk.java.net/jdk/pull/5557