Bug 249495

Summary: Introduce CallFrame::returnPCForInspection(), and removed some unused code.
Product: WebKit Reporter: Mark Lam <mark.lam>
Component: JavaScriptCoreAssignee: Mark Lam <mark.lam>
Status: RESOLVED FIXED    
Severity: Normal CC: webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   

Description Mark Lam 2022-12-16 12:49:43 PST 
CallFrame::returnPC() was relying on ReturnAddressPtr, which in turn expected to be able to untag any arbitrary return address read from a stack frame.  This will not always be possible when JITCage is enabled.  Also, CallFrame::returnPC() is only used for debugging purposes.  So, this patch will simplify its implementation and rename it to CallFrame::returnPCForInspection() to make it clear that it should only be used for debugging and analysis purposes.

We will also remove some related unused code.
Comment 1 Radar WebKit Bug Importer 2022-12-16 12:50:07 PST 
<rdar://problem/103457282>
Comment 2 Mark Lam 2022-12-16 13:10:17 PST 
Pull request: https://github.com/WebKit/WebKit/pull/7775
Comment 3 EWS 2022-12-16 15:58:52 PST 
Committed 258023@main (689b0ba375c8): <https://commits.webkit.org/258023@main>

Reviewed commits have been landed. Closing PR #7775 and removing active labels.