RFR: 8349374: [JVMCI] concurrent use of HotSpotSpeculationLog can crash [v3]

[Tom Rodriguez]

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

Tom Rodriguez has updated the pull request incrementally with one additional commit since the last revision:

  improve comments

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Changes:
  - all: https://git.openjdk.org/jdk/pull/23444/files
  - new: https://git.openjdk.org/jdk/pull/23444/files/459f5c36..5a5fd6fc

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=23444&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=23444&range=01-02

  Stats: 6 lines in 1 file changed: 4 ins; 0 del; 2 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