RFR: 8342035: jlink plugins for setting java.vendor, java.vm.vendor and java.vendor.url [v4]

[Mandy Chung]

On Wed, 4 Dec 2024 07:31:24 GMT, Henry Jen <henryjen at openjdk.org> wrote:

>> Add jlink plugins to allow branding change for java.vendor, java.vm.vendor and java.vendor.url.
>> 
>> The jlink plugin will change the value in java.lang.VersionProps, which will set those property values. The `java.vm.vendor` was initialized by VM with value set at build time, and then later be replaced with value from VersionProps.
>> 
>> To keep current behavior, we treat 'N/A' value as no-op to mimic current build behavior. Perhaps we don't really need this, as proper value should be set with `branding.conf` in official build.
>
> Henry Jen has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Clean up adapting review comments

src/java.base/share/classes/java/lang/VersionProps.java.template line 128:

> 126: 
> 127:         // In case VM is not yet set this property
> 128:         props.putIfAbsent("java.vm.vendor", VENDOR_VM);

Can this system property just be set here for simplicity?  The value of  `java.vendor` and `java.vm.vendor` system property are the same.

The VM does not need this value until VM initialization completes.  It's only needed by StatSampler (jstat).

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PR Review Comment: https://git.openjdk.org/jdk/pull/21964#discussion_r1870070455