RFR: 8340297: Use-after-free recognition for metaspace and class space [v4]

[Thomas Stuefe]

On Mon, 25 Aug 2025 05:11:07 GMT, Axel Boldt-Christmas <aboldtch at openjdk.org> wrote:

> You can use `'` as a digit separator. If that was the readability you were looking after.
> 
> ```c++
>   static constexpr uint32_t common_prefix        = 0x3E7A'0000;
>   static constexpr uint32_t common_prefix_mask   = 0xFFFF'0000;
>   static constexpr uint32_t instance_klass_token = 0x3E7A'0101;
>   static constexpr uint32_t array_klass_token    = 0x3E7A'0102;
> ```

I did not know that, thank you!

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/25891#discussion_r2299908021