RFR: 8290025: Remove the Sweeper

[Erik Österlund]

On Thu, 4 Aug 2022 15:46:12 GMT, Boris Ulasevich <bulasevich at openjdk.org> wrote:

> > Is there a plan for the arm32 port to support nmethod entry barriers?
> 
> I created a JBS record for this task: [JDK-8291302](https://bugs.openjdk.org/browse/JDK-8291302) I do not have time for this task now. If no one takes it, I hope to find time for this in the late autumn. For now, please, make a "short term solution where if nmethod aging is turned off, you can run without nmethod entry barriers".
> 
> thank you!

Okay. I put in a special ARM32 mode for you for now. It will work but it won't remove cold nmethods.  I really hope we can remove the special mode soon and assume all platforms have nmethod entry barriers. I don't like having special modes.

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PR: https://git.openjdk.org/jdk/pull/9741