From: Eric Hodel <drbrain@...7.net>
Date: 2012-09-06T07:21:46+09:00
Subject: Re: Ruby's Mark mechanism

On Sep 5, 2012, at 2:41 PM, Tridib Bandopadhyay <lists@ruby-forum.com> wrote:
> After doing one mark cycle how GC determines which slots are reachable?.
> Does they maintain any database for that?

The GC walks the pointers between objects to determine reachability.  It starts from Object (including constants, methods, etc.), the C stack and the global variables.