Project Panama Early-Access Builds

This is an early access build, from Project Panama, aimed at testing a prototype implementation of the foreign memory support, foreign function support and native extraction tooling from the "foreign-jextract" branch of the Panama repo. This build is intended for expert users, and is provided as a convenience so that they don't need to build from the source code.

Build 17-panama+3-167 (2021/5/18)

These early-access, open-source builds are provided under the GNU General Public License, version 2, with the Classpath Exception.

Linux / x64	tar.gz (sha256)	310853844
macOS / x64	tar.gz (sha256)	238712526
Windows / x64	zip (sha256)	235786913

Notes

• These builds are based on an incomplete version of JDK 17.
• What's new
  • new jextract code generation scheme which allows for more stability and faster startup
  • jextract supports new options to provide fine-grained filtering, and to customize name of the main header class
  • new library loading logic
  • support for upcall optimizations
  • new 'ResourceScope'/'SegmentAllocator' APIs
  • new '--enable-native-access' option to grant restricted native access to selected modules
• Additional Documentation
  • Foreign-Memory Access API
  • Foreign Linker API
  • jextract
• Known issues
  • missing intrinsic support for upcalls/downcalls passing arguments on stack and/or returning multiple register values.
  • jextract lacks integration with host compiler toolchain (e.g., linker paths are not automatically imported from GCC).
  • jextract does not support certain C types bigger than 64 bits (e.g. `long double`).
  • jextract does not support function-like macros.
  • jextract does not generate bitfields accessors.

• If you have difficulty downloading any of these files please contact download-help@openjdk.org.

Feedback

Please send feedback via e-mail to panama-dev@openjdk.org. To send e-mail to this address you must first subscribe to the mailing list.

Disclaimers

• Early-access (EA) functionality might never make it into a general-availability (GA) release.

• EA functionality might be changed or removed at any time.

• The existence of EA builds does not imply that the functionality being tested will be present in any particular GA release.

• The platforms supported and the packaging options available for a GA build might be different than those available for EA builds.

• EA builds are not tested to the same level to which Oracle tests GA builds. EA builds are produced for the purpose of gathering feedback. Use for any other purpose is at your own risk.

• EA builds might be missing security-vulnerability fixes that are available in GA builds or in other OpenJDK projects.

• Oracle does not provide support for EA builds.

International use restrictions

Due to limited intellectual property protection and enforcement in certain countries, the source code may only be distributed to an authorized list of countries. You will not be able to access the source code if you are downloading from a country that is not on this list. We are continuously reviewing this list for addition of other countries.