RFR: 8292596: Make SymbolHashMap a ResourceHashtable [v4]

[Harold Seigel]

On Fri, 19 Aug 2022 16:00:36 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

>> Please review this straightforward change to use ResourceHashtable for SymbolHashMap, which is used by the Class File Reconstituter.  The table maps Symbol* to constant pool indices for loaded classes (Symbol refcounting unnecessary as the class is not unloaded because it's in use).
>> Tested with jvmti tests locally and tier 1-3.
>
> Coleen Phillimore has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Hide SymbolHash inside of ConstantPool so people don't get the wrong idea about it.

Still looks good!
Thanks, Harold

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PR: https://git.openjdk.org/jdk/pull/9917