RFR: 8303089: [jittester] Add time limit to IRTree generation

[Leonid Mesnik]

On Wed, 22 Feb 2023 19:54:34 GMT, Evgeny Nikitin <enikitin at openjdk.org> wrote:

> Sometimes, the generation could take more than an hour and probably never stop. This PR adds a time limit (defaults to 10 minutes) to the generation of a single test.

Changes requested by lmesnik (Reviewer).

test/hotspot/jtreg/testlibrary/jittester/src/jdk/test/lib/jittester/Automatic.java line 143:

> 141:                 if (generatorThread.isAlive()) {
> 142:                     // maxTime reached, so, proceed to next test generation
> 143:                     generatorThread.interrupt();

I quickly looked at the code and I didn't find any places where the interrupted flag is checked. Does it stop the thread?

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PR: https://git.openjdk.org/jdk/pull/12722