RFR: 8349374: [JVMCI] concurrent use of HotSpotSpeculationLog can crash

[Tom Rodriguez]

This ensures that collectFailedSpeculations sees the initialization of the recently allocated failedSpeculationsAddress memory.

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Commit messages:
 - 8349374: [JVMCI] concurrent use of HotSpotSpeculationLog can crash

Changes: https://git.openjdk.org/jdk/pull/23444/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=23444&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8349374
  Stats: 8 lines in 1 file changed: 5 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/23444.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23444/head:pull/23444

PR: https://git.openjdk.org/jdk/pull/23444