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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii" /><title>OpenJDK: Panama</title><link rel="shortcut icon" href="../../images/nanoduke.ico" /><link rel="stylesheet" type="text/css" href="../../page.css" /><script type="text/javascript" src="../../page.js"><noscript></noscript></script><script src="https://cdn.usefathom.com/script.js" data-site="KCYJJPZX" defer="yes"></script></head><body><div id="main"> <h1>Project Panama: Interconnecting JVM and native code</h1> <p>We are improving and enriching the connections between the Java virtual machine and well-defined but “foreign” (non-Java) APIs, including many interfaces commonly used by C programmers.</p> <p>To this end, Project Panama will include most or all of these components:</p> <ul> <li>native function calling from JVM</li> <li>native data access from JVM or inside JVM heap</li> <li>new data layouts in JVM heap</li> <li>native metadata definition for JVM</li> <li>header file API extraction tools (jextract)</li> <li>native library management APIs</li> <li>native-oriented interpreter and runtime “hooks”</li> <li>class and method resolution “hooks”</li> <li>native-oriented JIT optimizations</li> <li>tooling or wrapper interposition for safety</li> <li>exploratory work with difficult-to-integrate native libraries</li> </ul> <h2>Community</h2> <p>This Project is sponsored by the <a href="/groups/hotspot/">Hotspot Group</a>.</p> <ul> <li>Mailing lists & News <ul> <li><a href="https://mail.openjdk.org/mailman/listinfo/panama-dev">panama-dev</a> — Foreign Function & Memory API, Vector API</li> <li><a href="https://mail.openjdk.org/mailman/listinfo/jextract-dev">jextract-dev</a> — jextract tool</li> <li>Stay tuned on latest Panama development at <a href="https://inside.java/tag/panama">Inside.java</a></li> </ul> </li> <li>Design documents <ul> <li><a href="https://github.com/openjdk/panama-foreign/blob/foreign-memaccess%2Babi/doc/panama_memaccess.md"> Panama foreign memory acccess</a></li> <li><a href="https://github.com/openjdk/panama-foreign/blob/foreign-memaccess%2Babi/doc/panama_ffi.md"> Panama foreign function support</a></li> <li><a href="https://github.com/openjdk/jextract/tree/master/samples">Panama jextract usage examples</a></li> <li>early problem space overview: <a href="https://cr.openjdk.org/~jrose/panama/isthmus-in-the-vm-2014.html">the isthmus in the VM</a></li> </ul> </li> <li>JEPs <ul> <li>Foreign Function & Memory API: <a href="https://openjdk.org/jeps/424">JEP-424</a></li> <li>Vector API: <a href="https://openjdk.org/jeps/426">JEP-426</a></li> </ul> </li> <li>Talks <ul> <li><a href="https://www.youtube.com/watch?v=4xFV-A7JToY">Project Panama: say goodbye to JNI!</a></li> <li><a href="https://www.youtube.com/watch?v=1JeoNr6-pZw">The Vector API in JDK 17</a></li> <li><a href="https://archive.fosdem.org/2020/schedule/event/bytebuffers/">ByteBuffers are dead, long live ByteBuffers!</a></li> <li><a href="https://www.youtube.com/watch?v=r4dNRVWYaZI">Deconstructing Panama</a></li> <li><a href="https://www.youtube.com/watch?v=PnVw1uFxSyw">Vector API</a></li> <li><a href="https://www.youtube.com/watch?v=cfxBrYud9KM">Panama: a foreign policy for Java</a></li> </ul> </li> </ul> <h2>Repository organization</h2> <p>Project Panama is designed to incubate a series of components for eventual inclusion in the JDK, via curated merge. Project Panama features are being actively developed in the following repositories:</p> <ul> <li><a href="https://github.com/openjdk/panama-foreign">Panama foreign support</a>, which adds support for foreign memory access, as well as for foreign function calls;</li> <li><a href="https://github.com/openjdk/panama-vector">Panama vector support</a>, which adds vectorization support in Java through JVM intriniscs; and</li> <li><a href="https://github.com/openjdk/jextract">jextract</a>, a tool which mechanically generate Java bindings from native library headers.</li> </ul> <p>The legacy Panama repository is also available <a href="https://hg.openjdk.org/panama/panama/">here</a>, although we do not expect to carry out further work there; as such this repository should not be used (and in the future we might make this more explicit by marking the legacy repository as <i>read-only</i>).</p> </div><div id="sidebar"><div id="openjdk-sidebar-logo"><a href="/"><img alt="OpenJDK logo" width="91" 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