[Webkit-unassigned] [Bug 101940] New: StructureStubInfo should NOT be movable

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=101940

           Summary: StructureStubInfo should NOT be movable
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: yoli at rim.com


Currently CodeBlock contains a Vector of StructureStubInfo, which means those StructureStubInfo objects can be moved whenever Vector wants to move them. A potential issue is StructureStubInfo::watchpoints holds the address of the owner StructureStubInfo. So it could end up with dangling pointer issue.

I haven't seen this really happens though, probably because the Vector grows and shrinkToFits always before any watchpoint is added?

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