[WIP] pending breakpoint support

[J. Johnston]

Thomas Fitzsimmons wrote:
> On Fri, 21 Nov 2003 17:46:43 -0500, J. Johnston wrote:
> 
> 
>>I have appended a patch to replace the previous hack.  I changed the
>>code so it supports conditionals and doesn't fail if you specify
>>source:line breakpoints. I also changed the mechanism to add a new flag
>>to the breakpoint struct called "pending".  As you will notice, this
>>adds a large number of checks because you can't just check for
>>enable_state == bp_enabled without also checking for the pending flag. 
>>I think that having two more enable states would have been simpler, but
>>I will let all of you decide.  With this change, you can enable/disable
>>the pending breakpoint and see any conditionals attached to it. Commands
>>should also work.
>>
> 
> 
> I've been using this patch since it was posted and it is very useful for
> both Mozilla and libgcj debugging.  One minor UI nit: I don't think I
> should be asked whether to make a breakpoint pending; I think the
> "pending" message is enough (or maybe the behaviour could be
> configurable).
>

IMO, the query should be the default.  If there is no query, every time you make 
a mistake, you would end up with an unwanted pending breakpoint.  Anybody, feel 
free to jump in with your comments.

Regarding the annoyance of having to answer many queries, this could be 
addressed in the future with a new setting, but that should be kept separate 
from the initial base implementation.

The query is not required for .gdbinit or mi.

-- Jeff J.

> In any case, even in its current early form, this patch is a huge
> improvement for shared-library debugging.
>