RFR: 8357396: Refactor nmethod::make_not_entrant to use Enum instead of "const char*"

[Cesar Soares Lucas]

On Tue, 20 May 2025 22:08:18 GMT, Cesar Soares Lucas <cslucas at openjdk.org> wrote:

> Please review this refactor to transform the reasons for making an nmethod not entrant from `const char*` into enum values.
> 
> Tested on Linux x64 with JTREG tier1-3 in fastdebug and release mode.

Thank you for the comments. I'll make the refactoring.

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PR Comment: https://git.openjdk.org/jdk/pull/25338#issuecomment-2905409542