Adding native method in custom jdk package (original) (raw)

David Holmes david.holmes at oracle.com
Thu Mar 23 00:22:05 UTC 2017

On 23/03/2017 4:07 AM, Christian Hagedorn wrote:

Thanks for your quick help. That got me on the right track, it does work now. I added my path to the LIBJAVASRCDIRS in the “jdk/make/lib/CoreLibraries.gmk” file.

Yes that was the missing part. But this is a build question, or at best a JDK question, not a hotspot question.

Regards, David

Best regards, Christian

Von: Bob Vandette [mailto:bob.vandette at oracle.com] Gesendet: Mittwoch, 22. März 2017 18:23 An: Christian Hagedorn Cc: hotspot-dev at openjdk.java.net Betreff: Re: Adding native method in custom jdk package Checkout this blog that provides a simple example of how to create and call a native function in a shared library. https://blogs.oracle.com/moonocean/entry/asimpleexampleofjni Let me know if you have any questions, Bob. On Mar 22, 2017, at 12:32 PM, Christian Hagedorn <ch-hagedorn at hispeed.ch> wrote: Hi, I have created a class Test.java in an own package test.lang inside the jdk ("jdk/src/share/classes/test/lang/Test.java"). Now I wanted to add a native method. I found out that my header was created inside" build/linux./jdk/gensrcheaders/testlangTest.h". So I have tried to just create a new file inside a new folder "jdk/src/share/native/test/lang/Test.c" including "testlangTest.h". From there I do my JNICALL to the VM like it is done for example in "jdk/src/share/native/java/lang/System.c". However this still results in a UnsatisfiedLinkError. I am sure I have to do some more steps to link and add it to the build properly. What am I missing? Best regards, Christian

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