[OpenJDK 2D-Dev] [9] Review Request: 8028486 java/awt/Window/WindowsLeak/WindowsLeak.java fails

Sergey Bylokhov Sergey.Bylokhov at oracle.com
Mon May 2 21:08:17 UTC 2016

On 02.05.16 23:52, Phil Race wrote:
> Just to make sure I understand this right, even if an application
> disposes of all Frames, we still somehow hold on to one Frame ?
> And it was the most recent one used by "validatedSrcData"
> due to some long reference chain ?


> WeakReferences are cleared quite aggressively so if an
> application loops doing
> then we may be re-creating these objects.

And this is fine because we use only identity checks inside the validate 
method. If the java object was deleted we should update the native state 

> On 05/02/2016 01:26 PM, Sergey Bylokhov wrote:
>> Hello,
>> Please review the fix for jdk9.
>> Bug evaluation was done by Anton:
>> http://mail.openjdk.java.net/pipermail/awt-dev/2016-April/011177.html
>> This is a cross-platform bug it affects d3d/ogl pipelines. The problem
>> is that BufferedContex cached information to skip some native
>> reconfigurations. But this cache cause a memory leak if some
>> data(src/dst surfaces) was cached and there was no new rendering in
>> this context(we create context per-d3d_device/ogl_config).
>> In the fix I changed all these caches to weak references. Note that i
>> use a references as initial values instead of null, just to eliminate
>> the null checks in the body of the method.
>> The test was updated to be more stable(flushed the EDT + flushed the
>> Disposer thread).
>> Bug: https://bugs.openjdk.java.net/browse/JDK-8028486
>> Webrev can be found at:
>> http://cr.openjdk.java.net/~serb/8028486/webrev.00

Best regards, Sergey.

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