[lworld] RFR: 8366093: [lworld] Add preview mode to C++ classloader

[David Beaumont]

On Tue, 23 Sep 2025 19:11:41 GMT, David Beaumont <duke at openjdk.org> wrote:

> C++ changes for supporting preview mode when preview mode resources (with new location flags) are available.
> 
> At the moment, this code will operate on non-preview jimage files (1.0) and act as if no preview resources are available by virtue of the default value for missing attributes being zero (which matches location flags for "normal" entries).

This is a new version of https://github.com/openjdk/valhalla/pull/1609, re-created so there's now a pr/xxx branch for use by dependent PRs.

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

PR Comment: https://git.openjdk.org/valhalla/pull/1618#issuecomment-3325229462