breakpoint for accessing memory location

[Eli Zaretskii]

> Date: Sun, 22 Oct 2006 18:55:46 -0400
> From: Robert Dewar <dewar@adacore.com>
> CC:  rodney.bates@wichita.edu,  gdb@sourceware.org
> 
> Eli Zaretskii wrote:
> 
> > The general rule is that watching a constant expression is silly,
> > since its value never changes and thus the watchpoint will never
> > break.  Thus, it's probably not what the user wanted, and a warning
> > would be a Good Thing, IMO.
> 
> Right, but of course it is recursively undecidable whether an
> expression is constant, so you don't really mean what you say.

No, I did mean what I said.  You asked about a principle, not about
the feasibility of its application.  Or at least that's what I thought
you were asking.