[Webkit-unassigned] [Bug 16829] New: NPAPI: NPN_SetException() appears broken

[bugzilla-daemon at webkit.org]

http://bugs.webkit.org/show_bug.cgi?id=16829

           Summary: NPAPI: NPN_SetException() appears broken
           Product: WebKit
           Version: 525+ (Nightly build)
          Platform: Macintosh
        OS/Version: Mac OS X 10.4
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: Plug-ins
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: playmobil at google.com
                CC: eric at webkit.org


Calling NPN_SetException from an NPAPI plugin doesn't work correctly (exception
not visible in calling Javascript).

If you pass in the plug-in object as the first parameter to NPN_SetException(),
then the test in NP_jsobject.cpp#369 - _NPN_SetException() [o->_class ==
NPScriptObjectClass] fails and the function does nothing.

If I retrieve the Window object via a call to NPN_GetValue() using
NPNVWindowNPObject and pass that into NPN_SetException(), then the
aforementioned test succeeds, however...

_NPN_SetException() sets the exception on what appears to be the global
Execstate:
ExecState* exec = rootObject->globalObject()->globalExec();

But this has no effect, as the local ExecState is the one checked for an
exception- see nodes.cpp#3645 ExprStatementNode::execute().

So the exception is never propagated.


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