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Asked: 2026-05-25T10:18:16+00:00

Writing a profiling I would also implement the typical task of heap profiling. Specifically

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Writing a profiling I would also implement the typical task of heap profiling. Specifically I would like to track, which thread has allocated how much data? Using JVMTI I thought it’s sufficient to hook to the events VM Object Allocation and Object Free. Sadly I read the first event is not triggered due to calls made to new.

The last idea I had was to check teh event MethodExit if its name is <init> and thus declare this call as an object allocation. However, within this event I cannot get the object and thus I cannot invoke GetObjectSize.

Simply iterating over the heap, bears no information regarding which object was allocated by which thread. Does anyone have an idea how to implement this?

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  1. Editorial Team

    Is there some reason you can’t call GetObjectSize from the MethodEntry event for a constructor?

    If you’re interested in executing code before a method returns, then you can listen for the MethodEntry event, and if the method is named <init>, you can call NotifyFramePop to listen for the FramePop event for the current frame. This event is similar to the MethodExit event, but occurs before the method returns so you can still get the this object.

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