[Webkit-unassigned] [Bug 229329] New: Remove assertIsTagged and assertIsNullOrTagged.

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Fri Aug 20 02:30:13 PDT 2021


            Bug ID: 229329
           Summary: Remove assertIsTagged and assertIsNullOrTagged.
           Product: WebKit
           Version: WebKit Nightly 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

These assertion utility functions relies on tagged pointers always having non-zero PAC bits.  This is an incorrect assumption.  A tagged pointer can have PAC bits that are completely zero.  Hence, these assert functions cannot be made to work reliably.  We should remove them to prevent them from being used, and potentially resulting in flaky assertion failures that will hard to debug later.

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