Re: [RFA] Reverse Debugging, 5/5

[Michael Snyder <msnyder@vmware.com>]

Eli Zaretskii wrote:
>> Date: Thu, 02 Oct 2008 14:40:51 -0700
>> From: Michael Snyder <msnyder@vmware.com>

>> The context is, the user says "show exec-direction"
>> with a target that doesn't support reverse.
>>
>> Is it better to just say "Forward", with no comment,
>> or is it better to let the user know that the question
>> is not applicable?  Or both?
> 
> Both, I'd say.

OK, how about this?

   (gdb) show exec-direction
   Forward (target `None' does not support exec-direction).


>>> Shouldn't we have some kind of caveat here regarding function prologue
>>> and epilogue?
>> Like what?
>>
>> If I've done my job right, prologues and epilogues
>> should be handled transparently, just like they are
>> when stepping forward.
> 
> Are they treated transparently when we step forward?  I had an
> impression that in optimized code, they aren't always transparent.

OK, I should have said "we do our best to treat them
transparently".  I suppose if the code is too optimized
for us to do a good job when we're going forward, we will
also have problems in reverse.