RFR: JDK-8317683: Add JIT memory statistics [v2]

[Thomas Stuefe]

On Wed, 11 Oct 2023 12:18:05 GMT, Andrew Dinn <adinn at openjdk.org> wrote:

> CollectMemStat

Okay, I can do that.

> Also, I know it is not currently an option to specify enum values for cflag types but it would be more coherent from a user perspective if there was one compiler directive with 3 possible values
> 
> ```
>   MemStat = Off*/Collect/Print     *=default
> ```

Sounds like a good idea, but I would like to keep framework changes out of this patch since that makes later backporting easier.

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PR Comment: https://git.openjdk.org/jdk/pull/16076#issuecomment-1757693138