[OpenJDK 2D-Dev] RFR: 8254024: Enhance native libs for AWT and Swing to work with GraalVM Native Image

[Andrii Rodionov]

On Fri, 16 Oct 2020 04:49:37 GMT, Sergey Bylokhov <serb at openjdk.org> wrote:

>>> > > How it is possible to test the current changes?
>>> > 
>>> > 
>>> > For GraalVM native image, we run JCK tests `api/java_awt` and `api/javax_swing`. Those tests built as a native image.
>>> 
>>> I meant some "steps to reproduce" the current bug, and which can be used to verify the current fix.
>> 
>> Actually, we have found this issue during JCK tests execution that was built as a native image. The fix criteria are
>> the successful tests run.
>
>> Actually, we have found this issue during JCK tests execution that was built as a native image. The fix criteria are
>> the successful tests run.
> 
> But what exact steps should be done to reproduce this bug w/o using jck or any external tools? Something like:
>  - Clone JDK
>  - Build JDK using some specific options.
>  - Create some small test case
>  - Somehow create the native image
>  - Run the app -> boom -> bug is reproduced

Yes, I understand what you mean.
Unfortunately, I don't know a straightforward way.
Maybe the easiest way to reproduce an error and validate the fix is to download the future version of GraalVM with
AWT/Swing support (hope it will be at the end of October), replace `libawt.a` to its unpatched library version and then
build a native image based on the following code:
        float[] data = new float[]{0.0f, 1.1f, 2.2f, 3.3f, 4.4f, 5.5f, 6.6f, 7.7f, 8.8f};
        Kernel kernel = new Kernel(3, 3, data);
        ConvolveOp op = new ConvolveOp(kernel);

        BufferedImage src = new BufferedImage(10, 10, BufferedImage.TYPE_INT_ARGB);
        BufferedImage dest = new BufferedImage(10, 10, BufferedImage.TYPE_INT_ARGB);

        op.filter(src, dest);
The built image run should throw "Unable to convolve src image" ImagingOpException exception.

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PR: https://git.openjdk.java.net/jdk/pull/562