RFR: 8315948: JDK-8315818 broke Xcomp on libgraal

Tue Sep 12 11:46:43 UTC 2023

On Fri, 8 Sep 2023 18:19:46 GMT, Doug Simon <dnsimon at openjdk.org> wrote:

> This PR fixes a regression caused by [JDK-8315818](https://bugs.openjdk.org/browse/JDK-8315818). Libgraal must not unblock a thread waiting on a blocking compilation, even if libgraal itself is not yet initialized. Initialization of libgraal is not prone to the same initialization deadlocks that jargraal can cause.

Looks reasonable to me.

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Marked as reviewed by thartmann (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/15643#pullrequestreview-1622049691