Make java.lang.Thread.container a known field

[babsingh]

java.lang.Thread.container is added in vmconstantpool.xml.

Accessing java.lang.Thread.container as a known field simplifies
and fixes the incorrect error handling in getVirtualThreadState.

[babsingh]

@gacholio Requesting your review. It resolves the issue with error handling.

[babsingh]

jenkins test sanity zlinux jdk21

[gacholio]

CRIU failure unrelated to this change. @tajila Why are these failures not being excluded?

[tajila]

CRIU failure unrelated to this change. @tajila Why are these failures not being excluded?

Its a new test, we will exclude.

[tajila]

@babsingh You'll need to triple deliver to 0.42

[babsingh]

Backports:

• [0.42] Virtual Thread Support #18494
• [0.43] Virtual Thread Support #18495

[gacholio]

Why the 0.43 ports?

[babsingh]

Why the 0.43 ports?

0.43 is a Java 21 Jan refresh: https://github.com/eclipse-openj9/openj9/milestones.

[gacholio]

Is that not a placeholder branch that will be refreshed from master? I wasn't asked to port anything to 0.43.

[pshipton]

Anything that goes into 0.42 (Java 21.0.1 - the OpenJ9 GA) should also go into 0.43 which includes the 21.0.2 update.
@TobiAjila fyi

[pshipton]

Is that not a placeholder branch that will be refreshed from master?

0.42 was a placeholder when we did M0, but since we branched Nov 14 for 0.42/0.43 M1 we need to start double/triple delivering.