[Webkit-unassigned] [Bug 48365] New: Remove output parameters from JITStackFrame

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=48365

           Summary: Remove output parameters from JITStackFrame
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: Mac OS X 10.5
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: barraclough at apple.com


The JIT stub functions presently use the stackframe to provide a couple of additional return values.
  * In the case of uncaught exceptions the exception value is returned on the stackframe.exception property.
  * In the case of caught exceptions the updated value for the callFrame register is returned on the stackframe.callFrame property.

Change exception returns such that exceptions are always returned on JSGlobalData::exception.
Change op_catch such that the new CallFrame value is returned from op_throw / vm_throw in regT0.

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