Adding native method in custom jdk package

[Christian Hagedorn]

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