RFR: 8364106: Include java.runtime.version in thread dump output

[Sean Coffey]

On Mon, 28 Jul 2025 23:43:35 GMT, David Holmes <dholmes at openjdk.org> wrote:

> Proposed output (similar to that produced for hs_err log):
> 
> 
> Full thread dump Java HotSpot(TM) 64-Bit Server VM (26-internal-2025-07-28-0739549.daholme... mixed mode, sharing)
>                  JRE version: Java(TM) SE Runtime Environment (26.0) (fastdebug build 26-internal-2025-07-28-0739549.daholme...)
> 
> Threads class SMR info:
> ... 
> 
> Testing:
>  - manual thread dump production via ctrl-\
>  -  tiers 1-3 (sanity)
> 
> Potentially the null checks are not needed in this case as we should not be able to generate a thread dump until after things are initialized, but it doesn't really hurt.
> 
> Thanks

Great to have this addition to the thread dump output. Thanks David.

Would there be merit to adding some test coverage for this ? Perhaps 1-2 extra lines in test/hotspot/jtreg/serviceability/dcmd/thread/PrintTest.java to check for the presence of "JRE version" etc. ?

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PR Comment: https://git.openjdk.org/jdk/pull/26520#issuecomment-3131228690