Re: GC and stack marking

[Eli Zaretskii]

> From: Stefan Monnier <address@hidden>
> Cc: address@hidden,  address@hidden
> Date: Tue, 20 May 2014 18:01:05 -0400
> 
> > I tried, but couldn't.  Suggestions for how to set up a GDB session
> > for that are welcome.
> 
> I guess you could try the following:
> - interrupt the dump just before setting purify-flag to nil.
> - get the value of purify-flag.
> - set a conditional break point in mark_object that catches the case
>   where the argument is equal to the value you just got.
> - "c"

That's how I found out that it was being marked by mark_stack.  But
that doesn't tell you how that value _got_ on the stack, does it?