RFR: 8329549: Remove FORMAT64_MODIFIER

[David Holmes]

On Fri, 3 Jan 2025 17:31:28 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

> This change removes FORMAT64_MODIFIER but adds another INT64_FORMAT_X_0_ macro to specify not having leading "0x" in the output.  Suggestions for better macro name welcome.
> GHA tested.

src/hotspot/share/utilities/globalDefinitions.hpp line 136:

> 134: 
> 135: // Format without leading 0x
> 136: #define INT64_FORMAT_X_0_        "%016"       PRIx64

Why the trailing underscore?

The name doesn't make sense to me given we have UINT64_FORMAT_X_0 and the only difference here is the leading `0x` which doesn't really have anything to do with signed-ness. Maybe `RAW_UINT64_FORMAT_X_0` to indicate the dropped `0x` prefix ?

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

PR Review Comment: https://git.openjdk.org/jdk/pull/22918#discussion_r1904656899