Subj : JS_AddRoot & finalize problem
To   : netscape.public.mozilla.jseng
From : anton muhin
Date : Thu Jul 22 2004 09:10 pm

Hello, dear gurus!

I have the following problem that I still cannot solve after googling & 
documentation reading.

I want to store in private data a reference (intenationally vagous term) 
to JS Array. Here the way I go:

In construct object:

         JSObject * const a = JS_NewArrayObject(cx, nElements, elements);

         JSObject * * root = new (JSObject*)(a);
         JS_AddRoot(cx, root);

         if (!JS_SetPrivate(cx, obj, root)) {
             JS_RemoveRoot(cx, root);
	    return JS_FALSE;
         }

         return JS_TRUE;

In finalizer:

         JSObject * * root = (JSOBject**)JS_GetPrivate(cx, obj);

         JS_RemoveRoot(cx, root);

	delete root;

However, in this case finalizer isn't get called!!! And, obviously, I 
get warnings:

JS engine warning: leaking GC root '' at ...
JS engine warning: 1 GC root remains after destroying the JSRuntime.
                    This root may point to freed memory. Objects reachable
                    through it have not been finalized.

If I comment out JS_AddRoot in construct phase, finalizer gets called.

Can somebody explain what goes on and what is the right they to achieve 
my goal? I especially don't understand why my object doesn't get garbage 
collected---it seems that I doesn't introduce any refernces to it. 
Session is quite simple: I just launch the jsshell and leave it. The 
object gets constructed as a prototype of the class I add into the 
object model.

Thank you in advance!

anton.

.