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[ios] fix memory leak in Slider #18681

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merged 1 commit into from Nov 13, 2023
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Context: #18365

Adding a parameter to the test:

[Theory("Handler Does Not Leak")]
[InlineData(typeof(Slider))]
public async Task HandlerDoesNotLeak(Type type)

Shows a memory leak in Slider, caused by the cycle

  • SliderHandler ->
  • UISlider events ->
  • SliderHandler

I could solve this problem by creating a SliderProxy class -- the same pattern I've used in other PRs to avoid cycles. This makes an intermediate type to handle the events and breaks the cycle.

Still thinking if the analyzer could have caught this, issue filed at:

jonathanpeppers/memory-analyzers#12

Context: dotnet#18365

Adding a parameter to the test:

    [Theory("Handler Does Not Leak")]
    [InlineData(typeof(Slider))]
    public async Task HandlerDoesNotLeak(Type type)

Shows a memory leak in `Slider`, caused by the cycle

* `SliderHandler` ->
* `UISlider` events ->
* `SliderHandler`

I could solve this problem by creating a `SliderProxy` class -- the
same pattern I've used in other PRs to avoid cycles. This makes an
intermediate type to handle the events and breaks the cycle.

Still thinking if the analyzer could have caught this, issue filed at:

jonathanpeppers/memory-analyzers#12
@rmarinho rmarinho merged commit 8d029d4 into dotnet:main Nov 13, 2023
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@jonathanpeppers jonathanpeppers deleted the SliderLeaks branch November 13, 2023 15:03
@github-actions github-actions bot locked and limited conversation to collaborators Dec 14, 2023
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memory-leak 💦 Memory usage grows / objects live forever platform/iOS 🍎
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