[Webkit-unassigned] [Bug 154061] New: Modern IDB: Ref cycle between IDBObjectStore and IDBTransaction

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=154061

            Bug ID: 154061
           Summary: Modern IDB: Ref cycle between IDBObjectStore and
                    IDBTransaction
    Classification: Unclassified
           Product: WebKit
           Version: Other
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: beidson at apple.com

Modern IDB: Ref cycle between IDBObjectStore and IDBTransaction

IDBTransaction has to retain a list of all object stores referenced during its lifetime, and object stores need a pointer to their transaction.

Fortunately it's easy to break this cycle: Once the transaction is aborting or committing, accessing its referenced object stores is no longer possible.

So at that time, the set of references object stores can be cleared, breaking the cycle.

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