RFR: 8349953: Avoid editing AOTConfiguration file in "make test JTREG=AOT_JDK=true" [v7]

[Calvin Cheung]

On Wed, 19 Feb 2025 19:20:13 GMT, Ioi Lam <iklam at openjdk.org> wrote:

>> When running HotSpot jtreg tests in the "AOT mode", for example:
>> 
>> 
>> make test JTREG=AOT_JDK=true TEST=open/test/hotspot/jtreg/runtime/stringtable
>> 
>> 
>> Before this PR, in the test set up phase, we record several AOT configuration files by running a few separate Java tools (javac, javap, jlink, and jar), and then combine them together with sed, grep, sort and uniq:
>> 
>> https://github.com/openjdk/jdk/blob/adc3f53d2403cd414a91e71c079b4108b2346da0/make/RunTests.gmk#L723-L744
>> 
>> After [JDK-8348426](https://bugs.openjdk.org/browse/JDK-8348426), the AOT configuration file will change to a binary format and can no longer be edited this way. In preparation for [JDK-8348426](https://bugs.openjdk.org/browse/JDK-8348426), we should change the "JTREG_AOT_JDK=true" set up to run a single Java program that accomplishes the same effect as the current implementation.
>> 
>> ** Changes in this PR **
>> 
>> This PR combines the invocation of these Java tools into a single Java program, so we just have a single AOT configuration file. It also uses the `-XX:ExtraSharedClassListFile` option to include the default classlist from the JDK home directory,
>
> Ioi Lam has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Review comments from @erikj79

Hotspot changes look good.

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Marked as reviewed by ccheung (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/23620#pullrequestreview-2628228204