RFR: 8304915: Create jdk.internal.util.Architecture enum and apply [v8]

[ExE Boss]

On Fri, 7 Apr 2023 21:13:03 GMT, Roger Riggs <rriggs at openjdk.org> wrote:

>> Define an internal jdk.internal.util.Architecture enumeration and static methods to replace uses of the system property `os.arch`.
>> The enumeration values are defined to match those used in the build.
>> The initial values are: `X64, X86, IA64, ARM, AARCH64, RISCV64, S390X, PPC64LE`
>> Note that `amd64` and `x86_64` in the build are represented by `X64`.
>> The values of the system property `os.arch` is unchanged.
>> 
>> The API is similar to the jdk.internal.util.OperatingSystem enum created by #[12931](https://git.openjdk.org/jdk/pull/12931).
>> Uses in `java.base` and a few others are included but other modules will be done in separate PRs.
>
> Roger Riggs has updated the pull request incrementally with three additional commits since the last revision:
> 
>  - Rename OperatingSystemProps to PlatformProps.
>    Refactor OperatingSystem initialization to use strings instead of integers.
>  - Revised mapping mechanism of build target architecture names to enum values.
>    Unrecognized values from the build are mapped to enum value "OTHER".
>    Renamed PPC64LE to PPC64 to reflect only the architecture, not the endianness.
>    Added an `isLittleEndian` method to return the endianness (not currently used anywhere)
>  - Revert changes to jdk.accessibility AccessBridge

src/java.base/share/classes/jdk/internal/util/Architecture.java line 47:

> 45:     // Cache a copy of the array for lightweight indexing
> 46:     private static final @Stable Architecture[] archValues = Architecture.values();
> 47: 

This now appears to be unused:
Suggestion:

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

PR Review Comment: https://git.openjdk.org/jdk/pull/13357#discussion_r1161082612