OQL in Eclipse memory analyzer - how to display array / ArrayList contents

Question

I have a dump which I opened with Eclipse Memory Analyzer.

I would like to export some contents of the heap into a file.

One of the fields I'm interested in is an ArrayList and I could not find a way to query the dump in a way that will return the contents of the array list as an output:

• Selecting the ArrayList object itself returns something like: java.util.ArrayList [id=0xf2765680]

• Selecting the array within the array list (select arr.elementData...) returns something like: java.lang.Object[] [id=0xf2765698;length=4]

• Selecting toString(arr) or toString(arr.elementData) returns empty string when the arrayList isn't null (and the string null when it is).

Is it really impossible??

Answer 1

To get list of elements

SELECT OBJECTS arr.@referenceArray FROM OBJECTS <your_array_address> arr

To re-map list of elements of array

SELECT OBJECTS elem.<field_name> FROM OBJECTS (SELECT OBJECTS arr.@referenceArray FROM OBJECTS <your_array_address> arr) elem

Real example

SELECT OBJECTS elem.callable.task.task FROM OBJECTS (SELECT OBJECTS arr.@referenceArray FROM OBJECTS 0x645eb6b80 arr) elem