[OpenJDK 2D-Dev] RFR: 8028539: Endless loop in native code of sun.java2d.loops.ScaledBlit

Jim Graham james.graham at oracle.com
Mon Oct 27 21:10:08 UTC 2014

The fix looks fine.  Isn't there a timeout you can set on the unit test 
rather than rolling your own inside the test?  Also, even if you 
interrupt the test, if the failure mode is an infinite loop in native 
code then the VM you are running in is probably not going to be happy. 
That only happens when the test fails, but is it worth running in a 
separate VM just in case?


On 10/27/14 1:51 PM, Phil Race wrote:
> https://bugs.openjdk.java.net/browse/JDK-8028539
> http://cr.openjdk.java.net/~prr/8028539/
> The trigger for the bug is that there is a translate component on the
> graphics
> which overflows what can be stored in a integer, and the native code we
> reach
> cannot handle this.
> Although the sofware loops was hanging, additionally D3D and OGL on Windows
> were not clipping this properly. The rendering appeared on screen when it
> should have been clipped.
> The fix is to add a test to see if any value overflows and then punt to
> the TransformHelper code which can handle and clip this properly.
> -phil.

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