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*** Project Valhalla "L-World Value Types" Early Access *** Prototype Version: LW2 This is an "early access" build, from "Project Valhalla" [1], aimed at testing a "Value Types" implementation within the JVM, where-by value types may interoperate with existing type descriptors. Otherwise known as "L-World Value Types" (L-World) [2]. Intended for a number of expert users with active interest in the Valhalla project, and is provided as a convenience to users needing to build from source code (branch "lworld") [3]. Warning, not only is this build based on an incomplete version of "JDK 12", there has been less than comprehensive testing carried out. * System Limitations - platforms: x64 Linux, x64 Mac OS X, Windows - no support for atomic fields containing value types (work-in-progress for an update) - no AOT, CDS, redefineclasses - -Xint and C2 only, no C1, no tiered-compilation - interpreter is not optimized, focus is on JIT optimization * EA disclaimer - EA release functionality might not be released in a GA binary. Any EA functionality might be changed or removed - EA builds do not imply that the feature is being considered to any scheduled OpenJDK release - The list of supported platforms at GA might be different than the platforms supported during EA - These binaries have not been tested to the same level to which Oracle would test a GA binary. It has been produced for gathering feedback. Use for any other purpose is at your own risk - These binaries might be missing security vulnerabilities fixes available in GA binaries or in other OpenJDK projects - Oracle does not provide support for these binaries * Filing Bugs Send email to valhalla-dev@openjdk.java.net Current known issues [4] [1] https://wiki.openjdk.java.net/display/valhalla/Main [2] https://wiki.openjdk.java.net/display/valhalla/L-World+Value+Types [3] http://hg.openjdk.java.net/valhalla/valhalla/ [4] https://bugs.openjdk.java.net/issues/?filter=35615