[Webkit-unassigned] [Bug 166778] New: The ObjC API's JSVirtualMachine's map tables needs to be guarded by a lock.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=166778

            Bug ID: 166778
           Summary: The ObjC API's JSVirtualMachine's map tables needs to
                    be guarded by a lock.
    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

Now that we have a concurrent GC, access to JSVirtualMachine's m_externalObjectGraph and m_externalRememberedSet needs to guarded by a lock since both the GC marker thread and the mutator thread may access them at the same time.

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