[Webkit-unassigned] [Bug 142022] New: DFG abstract heaps should respect difference between heap and stack

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=142022

            Bug ID: 142022
           Summary: DFG abstract heaps should respect difference between
                    heap and stack
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: fpizlo at apple.com

We will soon be in a world where a "world clobbering" operation cannot write to our stack, but may be able to read from it.  This means that we need to change the DFG abstract heap hierarchy to have a notion of Heap that subsumes all that World previously subsumed, and a new notion of Stack that is a subtype of World and a sibling of Heap.

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