Re: [PATCH v2] Prevent downgrading of hardware watchpoints if possible

[Tom Tromey <tom@tromey.com>]

>>>>> "Hannes" == Hannes Domani <ssbssa@yahoo.de> writes:

Hannes> The lazy flag of a value can tell us if the value contents are available.
Hannes> But this could be either because it was simply never actually accessed,
Hannes> or it tried to be accessed, and failed.
Hannes> The latter are interesting for watchpoints, the former are not.

Hannes> Currently it only uses lazy values if they are at the head of the value
Hannes> chain, but this is fragile logic, and degrades some watchpoints to
Hannes> software watchpoints where it's actually not necessary.

Hannes> So this adds a new value flag 'm_fetch_lazy_failed' which tells if the
Hannes> watchpoint expression actually tried to access the value and failed.
Hannes> And this is used instead of the value chain location to tell if a lazy
Hannes> value should be used as a watchpoint location.

Thanks for doing this.  I think this is ok.
Approved-By: Tom Tromey <tom@tromey.com>

Tom