Commit c4ad9150 authored by Committed by Marge Bot
rts: TraverseHeap: Introduce callback for subtree completion
The callback 'return_cb' allows users to be perform additional accounting when the traversal of a subtree is completed. This is needed for example to determine the number or total size of closures reachable from a given closure. This commit also makes the lifetime increase of stackElements from commit "rts: TraverseHeap: Increase lifetime of stackElements" optional based on 'return_cb' being set enabled or not. Note that our definition of "subtree" here includes leaf nodes. So the invariant is that return_cb is called for all nodes in the traversal exactly once.
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