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

Christian Hagedorn ch-hagedorn at hispeed.ch
Wed Mar 22 18:07:32 UTC 2017

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

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/a_simple_example_of_jni

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/gensrc_headers/test_lang_Test.h".

So I have tried to just create a new file inside a new folder "jdk/src/share/native/test/lang/Test.c" including "test_lang_Test.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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