Re: Spider Monkey and jsdiDebuggerService Crash?

sorry for my terrible explanation.

Our product(Web RIA Solution) gives development(including debugger) 
environment and it's runtime(script + plugins for each browser) to 
customers. Customers can make web app which runs on browsers. Some 
requirement needs super fast communication, So we supply native plugins 
for each browser.

Development environment contains:
  1. GUI Script Debugger (it uses jsdIDebuggerService through javaxpcom)
  2. Browser for debugging
     (based on XUL runner which contains our c++ firefox extension)
  3. ...

Everything was fine till the native plugin calls java script while 
debugging. When native plugin calls java script, just whole IDE crash. 
Our c++ engineer can't receive any exception or entry point to inspect.

But that plugin works okay with just clean firefox. It crashes when some 
other component uses jsdIDebuggerService like as our IDE(when it 
debugging script) or firebug.

I have two suspects:

Q. If some native c++ code can invoke some script, It must be executed 
UI-thread, because some XHTML DOM can be modified by script. Our c++ 
code seems to have not guarantee for that.  Am I right? then how to do that?
(I am an eclipse based IDE developer so I don't know much)


Q. Does calling script through Spider Monkey can be problem with using 
jsdIDebuggerService?