On Fri, 22 Nov 2024 17:04:38 GMT, Severin Gehwolf <sgehw...@openjdk.org> wrote:

>> Please review this simple patch which adds a new external system property 
>> `jdk.patched` when the runtime has been patched with the `--patch-module` 
>> switch. This is useful for two reasons: 1) it allows one to determine at 
>> run-time whether or not `--patch-module` has been used (by querying the said 
>> property) 2) allows tools, such as `jlink` doing the same without needing to 
>> expose internal properties the JVM sets on initialization.
>> 
>> Testing:
>> 
>> - [x] GHA (includes new test)
>> - [x] New jtreg test 
>> 
>> Thoughts?
>
> Severin Gehwolf has updated the pull request incrementally with one 
> additional commit since the last revision:
> 
>   Mention jdk.patched in System class

For jlink to detect if the current runtime is patched, have you tried 
`ModuleBootstrap.patcher().hasPatches()` which I think it's an alternative to 
avoid introducing this system property.

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PR Comment: https://git.openjdk.org/jdk/pull/22277#issuecomment-2501629128

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