RFR: 8314225: SIGSEGV in JavaThread::is_lock_owned

[Dean Long]

On Wed, 24 Apr 2024 19:50:08 GMT, Kevin Walls <kevinw at openjdk.org> wrote:

> Removal of JavaThread's MonitorChunks member.  This held lock information during deoptimization, but access to it is unnecessary for anything other than the deoptimization itself.
> 
> Access to it in is_lock_owned() was racy, and caused rare crashes.

Looks good.

After thinking about it some more, I think we need a stronger guarantee that the monitors are always inflated during deoptimization.

-------------

Marked as reviewed by dlong (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/18940#pullrequestreview-2021116316
Changes requested by dlong (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/18940#pullrequestreview-2021693970