[jdk21u-dev] RFR: 8343607: C2: Shenandoah crashes during barrier expansion in Continuation::enter

[Aleksey Shipilev]

On Fri, 1 Aug 2025 23:05:58 GMT, Cesar Soares Lucas <cslucas at openjdk.org> wrote:

> Clean backport of this shenandoah c2 fix. We hit this bug in our (Amazon) internal CI system and also was reported by RedHat to happen on their CI as well.

The backport itself looks fine. I suspect bots would mark it as `clean` once they recognize it as backport.

Two things:
 1. Merge from current jdk21u-dev master to the GHA cross-compilation jobs fixed.
 2. The PR _itself_ should be named `Backport 45c914c3ad8fbc406af9ba9dec97f11c28c91299`, not the commit only. This would get it properly recognized as backport.

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Marked as reviewed by shade (Reviewer).

PR Review: https://git.openjdk.org/jdk21u-dev/pull/2029#pullrequestreview-3083470447
PR Comment: https://git.openjdk.org/jdk21u-dev/pull/2029#issuecomment-3149883253