On Tue, 26 Dec 2023 10:24:42 GMT, Johan Vos <j...@openjdk.org> wrote:

> I'm still looking into adding a test. The challenge is that the (previously) 
> uncollected items are of type `com.sun.glass.ui.MenuItem`, and afaik we can't 
> use JMemoryBuddy to check the collectable state of instances on the heap that 
> we don't have a reference to ourselves. I see 2 options:
> 
> * a unit test, with new shim classes so that we get access to 
> `com.sun.glass.ui.MenuItem` from the test. The problem here is that this 
> quickly becomes a test for the shim class and not for the real classes
> * a systemtest that can somehow inspect the heap and count the instances of 
> `com.sun.glass.ui.MenuItem`

Perhaps add a package private method to get access to 
`GlassSystemMenu#systemMenus` (or use reflection)?  I think you could then put 
a weak reference on the returned list (or items) and see if that disappears.

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PR Comment: https://git.openjdk.org/jfx/pull/1283#issuecomment-1869617031

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