Re: [RFA] set/show enable-software-singlestep

[Joel Brobecker <brobecker@adacore.com>]

Hi Michael,

> 2008-06-23  Michael Snyder  <msnyder@specifix.com>
> 
> 	* infrun.c (can_use_sw_ss): New mode variable.
> 	(show_can_use_sw_ss): New setshow helper function.
> 	(resume): Check for can-use-software-singlestep.
> 	(_initialize_infrun): Add set/show command for 
> 	can-use-software-singlestep.

As discussed previously on gdb@, I think this is a useful feature
even outside of reverse debugging.  Regarding Pedro's question
about making this feature transparent, that would be tough for
the example I gave, which is Tru64 - we want to be able to use
s/w single-step only on programs that use threads. To make it automatic,
we'd have to reliably detect that a program uses threads. Perhaps
this is doable, but having the option is an easy first step. Later
on, we can always extend the option to a tri-state with an "auto"
setting if it helps...

The code itself looks good, but I'm not so sure about accessing this
feature through a "maint" command. Since in my eyes it's a feature,
I'd personally be inclined to make it accessible through  "set/show
can-use-software-singlestep".  It is an obscure feature, however, so
I'm not really that concerned about it. How about we wait for another
week to see if we have any other comment; if not, then just commit
as is.

-- 
Joel