RFR: 8365060: Historical data for JDK 8 should include the jdk.net package [v2]

[Aleksey Shipilev]

On Thu, 28 Aug 2025 14:04:02 GMT, Jan Lahoda <jlahoda at openjdk.org> wrote:

>> In JDK 8, the package `jdk.net` was exported and part of `rt.jar`, and hence should have been part of the historical data for `--release`, but it is not. The primary goal of this PR is to add historical data for `jdk.net` for JDK 8.
>> 
>> The changes herein are based on JDK 8u462. I used the Probe running on JDK 8 to dump the classfiles, along these lines:
>> 
>> $ java -classpath .../make/langtools/src/classes/ build.tools.symbolgenerator.Probe /tmp/jdk8-classfiles
>> 
>> 
>> and then the up-to-date `CreateSymbols` to generate the `sym.txt` files, along these lines:
>> 
>> java --add-exports jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED --add-exports jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED  CreateSymbols.java build-description-incremental-file .../src/jdk.compiler/share/data/symbols/symbols .../src/jdk.compiler/share/data/symbols/include.list 8 /tmp/jdk8-classfiles '<none>' --normalize-method-flags
>> 
>> 
>> There are a few APIs that have been added for this release, and a few representational changes.
>> 
>> Most notably - the ordering of "removal" entries (i.e. those that start with `-`) and "add" entries is much more strict in the current `CreateSymbols`, and so there are some changes where the removal entries are moved to the front. I went through those, and they seem OK to me.
>> 
>> I'll add specific comments to the other updates to the files.
>
> Jan Lahoda has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Adjusting formatting as suggested.

Marked as reviewed by shade (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/26817#pullrequestreview-3165680733