[Webkit-unassigned] [Bug 149050] New: Fix JSC_objectsAreImmortal to work with JSC_useZombieMode

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=149050

            Bug ID: 149050
           Summary: Fix JSC_objectsAreImmortal to work with
                    JSC_useZombieMode
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Local Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mark.lam at apple.com

Previously, JSC_objectsAreImmortal works by marking all dead objects.  If we also have JSC_useZombieMode enabled, the marking of dead objects may end up walking over zombified objects and crash the VM.  To be compatible with JSC_useZombieMode, We can make JSC_objectsAreImmortal work by sweeping dead objects but never freeing them instead.

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