On Tue, 25 Nov 2025 14:52:23 GMT, David Beaumont <[email protected]> wrote:
> Plumbing for javac flags, mostly inspired by/copied from test commits made by > @lahodaj . > > There are several things here, mostly entangled, so it's a bit tricky to try > splitting this out, but it would be possible if people wanted. > > The biggest "refactoing" part of this PR is > "src/jdk.compiler/share/classes/com/sun/tools/javac/file/JRTIndex.java" which > now has a properly controlled lifecycle and disposed its resources correctly. > Prior to this, the class used a non-closeable JRT file-system reference, > which leads to "persistent open file" issues such as JDK-8357249. > > This *does* mean that if compilation and the runtime have the same preview > mode, then a 2nd JRT file system to the same jimage file is "opened", *but* > the file system itself is lightweight, non-caching and both of them will use > the underlying SharedImageReader (which is where nodes are cached etc.) so it > really shouldn't be an issue (I will make sure javac benchmarks are checked > however). > > The benefit of this is that now, the shared index (which does do some > caching) is correctly tracked across all users, and will be closed when the > last user closes the lightweight wrapper instance. > > A lot of the smaller "spot fix" changes in this PR were just copied by me, or > at least inspired directly by Jan's work, so I may have missed some semantic > subtlety in the code I'm not familiar with. Please evaluate that carefully. This pull request has now been integrated. Changeset: 7bcb2999 Author: David Beaumont <[email protected]> Committer: Roger Riggs <[email protected]> URL: https://git.openjdk.org/valhalla/commit/7bcb29996955edd5473c2e5e8ecf30c5c03d882e Stats: 667 lines in 17 files changed: 518 ins; 86 del; 63 mod 8372515: [lworld] Plumb in javac flags for compiling with preview mode Reviewed-by: mcimadamore, rriggs ------------- PR: https://git.openjdk.org/valhalla/pull/1761
