RFR: JDK-8304723: Statically allocate global mutexes [v5]

[Thomas Schatzl]

On Thu, 23 Mar 2023 15:27:58 GMT, Justin King <jcking at openjdk.org> wrote:

>> Switch to statically allocate storage for all of Hotspot's global mutexes and monitors. This avoids needing to allocate each one dynamically at startup. These also live for the lifetime of the program, so this reduces any potential memory fragmention in the C heap.
>
> Justin King has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Move alignas before static
>   
>   Signed-off-by: Justin King <jcking at google.com>

Lgtm.

Please close https://bugs.openjdk.org/browse/JDK-8304736 again now that this issue has been fixed, or probably better use `/issue add JDK-8304736`

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Marked as reviewed by tschatzl (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/13143#pullrequestreview-1356250411