[Webkit-unassigned] [Bug 163151] New: Web Inspector: Heap Snapshot should be able to tell me if an object was collected

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=163151

            Bug ID: 163151
           Summary: Web Inspector: Heap Snapshot should be able to tell me
                    if an object was collected
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Local Build
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Web Inspector
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: sbarati at apple.com
                CC: bburg at apple.com, ggaren at apple.com, joepeck at webkit.org,
                    mattbaker at apple.com, nvasilyev at apple.com,
                    timothy at apple.com, webkit-bug-importer at group.apple.com

Currently, I'm trying to track the lifetime of a particular object. I want to find out if it was collected between GCs. I have no way of finding this information out now. It'd be very nice to be able to ask some questions about a particular object:
1. Did it ever get deleted?
2. Between which two snapshots was it deleted?

Also, it could be neat to switch to a view where deletions are part of heap snapshot diffs. This would help me out a lot.

Currently, it's very hard to tell if an object is still alive because it's impossible to track all the paths to an object, so it's hard to tell if it might exist thought a particular path in the object graph that I'm not aware of. The reason it's hard to track all paths is that global objects point to many things.

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