REOPENED295215
Fix inheritance of type compactness in TZone type specification 
https://bugs.webkit.org/show_bug.cgi?id=295215
Summary Fix inheritance of type compactness in TZone type specification
David Degazio
Reported 2025-06-30 12:11:36 PDT
TZone types currently track whether or not that type is compact-allocated, but this is based solely on whether the type was annotated with a compact or non-compact macro. Really, we want compactness to be inherited, so that if any class in an annotated type's hierarchy needs to support compact pointers, the derived type also must support compact pointers. This is currently respected in allocation logic, so we just need to also check requiresCompactPointers<T>() for the type when initializing the specification so everything is consistent.
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Radar WebKit Bug Importer
Comment 1 2025-06-30 12:12:00 PDT
<rdar://problem/154691668>
David Degazio
Comment 2 2025-06-30 13:09:45 PDT
Pull request: https://github.com/WebKit/WebKit/pull/47390
EWS
Comment 3 2025-07-01 12:00:42 PDT
Committed 296878@main (2cf886ecf010): <https://commits.webkit.org/296878@main> Reviewed commits have been landed. Closing PR #47390 and removing active labels.
David Degazio
Comment 4 2025-07-07 14:41:31 PDT
Reopened Bugzilla. Revert 296878@main due to apparent WebView regression, tracking revert in https://bugs.webkit.org/show_bug.cgi?id=295550.
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