Re: [patch] Warn on constant value watchpoints

[Eli Zaretskii <eliz@gnu.org>]

> Date: Sun, 8 Jun 2008 17:53:02 +0200
> From: Jan Kratochvil <jan.kratochvil@redhat.com>
> 
> 
> --tKW2IUtsqtDRztdT
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> 
> Hi,
> 
> idea came from a discussion with the Firefox maintainer Martin Stransky who had
> disfunctional watchpoint on the address of a variable:
> 
> (gdb) watch 0x4343548
> Watchpoint 1: 70530376

Should we allow such watchpoints? under what circumstances are they
useful?

> +      if (v == NULL && !query
> +		(_("Do you insist on this watchpoint with a constant value? ")))

I think a better text for this question would be

  Really watch constant value %s?

> +If you watch for a change in a numerically entered address you need to
> +dereference it as the address itself is just a constant number which will never
> +change:
> +
> +@smallexample
> +(@value{GDBP}) watch 0x600850
> +Do you insist on this watchpoint with a constant value? (y or n) n
> +Watchpoint with a constant value was cancelled.
> +(@value{GDBP}) watch *(int *) 0x600850
> +Watchpoint 1: *(int *) 6293584
> +@end smallexample

Thanks, but please mention in the text that GDB asks for confirmation
because watching a constant value is not generally useful.  Otherwise,
the example might not be fully understood.

Other than that, the patch for the manual is approved (assuming the
code is approved).