Call For Vote: Project Tsan

Roman Kennke roman at
Thu Feb 14 09:32:42 UTC 2019

Vote: yes


> Hello,
> I hereby propose the creation of the Tsan Project with Jean Christophe
> Beyler as the Lead and the Serviceability Group as the sponsoring Group.
> In accordance with the OpenJDK guidelines [1], the TSAN project would
> provide a venue to explore and incubate a Thread SANitizing (TSAN) feature
> that could be integrated into the Hotspot JVM and the JVM Tool Interface.
> This includes working, evaluating, and incubating a Thread-Sanitizer
> implementation [2] for Java.
> The Google platform team has historically worked on a Thread SANitizing
> (TSAN) project internally. Thread sanitizing allows Java users to see data
> race conditions in their Java projects. It is used internally to
> automatically detect and warn users of existing data races detected while
> running user code. The TSAN project proposes to investigate, in the open,
> how these changes could be made general enough to be pushed into the
> mainline, or should be dropped due to being too specific or could be done
> using other existing mechanisms. The project would not be a Google-only
> project and will have a mailing list to discuss and potentially accept any
> contribution trying to extend and/or enhance the TSAN implementation.
> The evaluation criteria for the TSAN implementation includes but would not
> be limited to:
>      * Performance: not adding overhead to non-tsan runs is paramount and
> there are various means to do so
>      * General usefulness for the community at large so that the TSAN
> feature is deemed a good feature to have
> If the TSAN implementation becomes stable and is deemed useful enough, the
> TSAN project would shepherd the work in one or more JEPs to integrate TSAN
> into the mainline of OpenJDK.
> The Tsan project scope was discussed during the call for discussion for the
> Atlantis project [3]. It was determined that the Atlantis project's scope
> was not well defined and it would be better to start with a separate Tsan
> project with an end goal and better determined boundaries.
> The current suggested initial Reviewers and Committers would be but is most
> likely not going to be limited to (alphabetical order of first name):
> * Alex Menkov (amenkov)
> * Chuck Rasbold (rasbold)
> * Daniil Titov (dtitov)
> * Jean Christophe Beyler (jcbeyler)
> * Liam Cushon (cushon)
> * Serguei Spitsyn  (sspitsyn)
> Votes are due by Wednesday 27, 23:59 pm Pacific Time.
> Only current OpenJDK Members [3] are eligible to vote on this motion.
> Votes must be cast in the open on the discuss list. Replying to this
> message is sufficient if your mail program honors the Reply-To header.
> For Lazy Consensus voting instructions, see [5].
> Thanks,
> Jc
> [1]
> [2]
> [3]
> [4]
> [5]

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