komodo

I just posted a quick blog on some hacky ways to enable JIT debugging with Xdebug:

http://www.openkomodo.com/blog/jeffg/jit-php-debugging-komodo

My example is Komodo IDE, but this should be usable for any Xdebug client app. It should be simple enough to enable JIT debugging in a Drupal instance by adding this line to your custom module:

ini_set('xdebug.remote_mode', 'jit');

You should keep in mind that if xdebug.remote_mode is set to JIT, you can't debug in the normal way.