RFR: 8322703: Intermittent crash in WebView in a JFXPanel from IME calls on macOS

[Kevin Rushforth]

On Fri, 5 Jan 2024 23:59:31 GMT, Kevin Rushforth <kcr at openjdk.org> wrote:

> As noted in the JBS bug, this is a follow-on to [JDK-8196011](https://bugs.openjdk.org/browse/JDK-8196011) that I discovered while testing the fix for [JDK-8221261](https://bugs.openjdk.org/browse/JDK-8221261) (a deadlock in the IME code when using WebView in a JFXPanel on macOS).
> 
> I have tested this in connection with with the proposed fix for JDK-8221261, although it is a valid fix regardless.
> 
> This expands the fix done in [JDK-8221261](https://bugs.openjdk.org/browse/JDK-8221261) to call all of the WebKit methods on the right thread. Additionally, we sometimes see spurious exceptions where the committed text is coming back as null, so I changed the log level to "fine" rather than "severe" for those exceptions. I'll file a follow-up bug  to see if any of these are real problems or not.

NOTE to reviewers: If you want to test this, you will also need the fix for [JDK-8221261](https://bugs.openjdk.org/browse/JDK-8221261), which is under review in PR #1327 to avoid the deadlock.

I have created a test branch that has both fixes:

https://github.com/kevinrushforth/jfx/tree/test-8221261-8322703

You can either fetch that branch or fetch both PR branches and build. It is not necessary to build the native WebKit if you have an up-to-date library in your cache.

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PR Comment: https://git.openjdk.org/jfx/pull/1321#issuecomment-1885428778