RFR: 8301712: [linux] Crash on exit from WebKit 615.1

[Kevin Rushforth]

On Wed, 8 Feb 2023 13:51:29 GMT, Jay Bhaskar <jbhaskar at openjdk.org> wrote:

> Issue: [linux] Crash on exit from WebKit 615.1 Crash dump observed on Window exit
> Root cause: Accessing local storage data of a thread having client data like font cache during VM shutdown
> Solution: Add a shutdown hook to ThreadTimers class, so that no timer class doesn't fire any function during the shutdown.

Reviewers: @kevinrushforth @HimaBinduMeda

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PR: https://git.openjdk.org/jfx/pull/1027