RFR: 8346193: CrashGCForDumpingJavaThread do not trigger expected crash build with clang17 [v5]

[SendaoYan]

On Thu, 2 Jan 2025 05:20:06 GMT, Kim Barrett <kbarrett at openjdk.org> wrote:

>> 1. --with-debug-level=optimized: `java -XX:+CrashGCForDumpingJavaThread -version` do not trigger jvm crash and print version meaasge.
>> 2. --with-debug-level=release: `java -XX:+CrashGCForDumpingJavaThread -version` report VM option 'CrashGCForDumpingJavaThread' is develop and is available only in debug version of VM.
>> 3. --with-debug-level=fastdebug: `java -XX:+CrashGCForDumpingJavaThread -version` trigger jvm crash correctly.
>
> Good.  Those results are as expected.  In case it isn't clear, the reason for the difference between optimized
> (no crash) and fastdebug (crash) is that optimized defaults VerifyBeforeExit to false, while for fastdebug it
> defaults to true.  Enabling that option in an optimized build will crash in the same manner as fastdebug.

Thanks for the detail explanation.

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PR Review Comment: https://git.openjdk.org/jdk/pull/22757#discussion_r1900564049