Integrated: 8368629: Texture.update sometimes invoked for a disposed Texture

[Lukasz Kostyra]

On Tue, 28 Oct 2025 15:54:13 GMT, Lukasz Kostyra <lkostyra at openjdk.org> wrote:

> This PR fixes NPE thrown when trying to update D3D texture in some rare scenarios.
> 
> On more stressful cases (like the one using Canvas attached to this issue) it is possible that a D3DTexture.update() call will go through after the Resource Pool already pruned the underlying Texture's resource. This in turn caused an NPE, which propagated to higher levels and disrupted the rendering loop, causing the Canvas to not be drawn anymore. The update() call seems not to be called more than once on an already freed resource, suggesting this is some sort of rare race between the pool and the drawing code.
> 
> This change prevents the NPE from being thrown. I noticed no visual problems with the test even when the update() call is rejected by the newly added check. Best way to verify it is to add a log call inside added `if (!resource.isValid())` blocks when running the test, it will occasionally get printed but the test itself won't change its behavior like it does without this change.

This pull request has now been integrated.

Changeset: 8bf8ae6c
Author:    Lukasz Kostyra <lkostyra at openjdk.org>
URL:       https://git.openjdk.org/jfx/commit/8bf8ae6c1782e13b1e17fe89062356b96c9b71ad
Stats:     31 lines in 7 files changed: 31 ins; 0 del; 0 mod

8368629: Texture.update sometimes invoked for a disposed Texture

Reviewed-by: angorya, kcr, arapte, jhendrikx

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PR: https://git.openjdk.org/jfx/pull/1951