[Webkit-unassigned] [Bug 33360] New: Web Inspector: Console-invoked ObjC methods lose their string parameters

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=33360

           Summary: Web Inspector: Console-invoked ObjC methods lose their
                    string parameters
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: Web Inspector
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: jalkut at red-sweater.com
                CC: timothy at hatcher.name, rik at webkit.org,
                    keishi at webkit.org, pmuellr at yahoo.com,
                    joepeck at webkit.org, pfeldman at chromium.org,
                    bweinstein at apple.com


1. Inspect a document whose DOM has a WebScriptObject attached with exposed
methods.
2. Arrange that one of those exposed methods takes a string parameter, e.g.:

- (void) debugLog:(NSString*)theLogString
{
    NSLog(@"%@", theLogString);
}

3. Attempt to call the bridged method from the inspector's console window,
e.g.:

window.myObject.debugLog_("hello there!");

RESULT: Although the bridged method is called, the "hello there!" string does
not survive the transition, and arrives as a nil parameter.

Expected: The strings generated in the context of the Console/Inspector should
survive as well as strings evaluated and passed in the course of a page's
imported scripts.

Note that it's not just a literal vs. object type of problem. I declared a
string object in the console as:

var myString = new String("hello there!");

And passing that variable to the bridged method fails as well.

I did a cursory hunt through WebCore before I gave up trying to find the root
cause. But my naive assumption is it has something to do with the
convertValueToObjcValue: method in objc_utility.mm. It appears that a valid
JSValue exists at this point, and even claims to be a string, but the block of
code starting with "case ObjcObjectType:" is not able to locate a root object
for the JSValue.

Hope this helps,
Daniel

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