Re: [RFC] varobj deletion after the binary has changed

[Vladimir Prus <ghost at cs dot msu dot su>]

Daniel Jacobowitz wrote:

> On Tue, Jan 23, 2007 at 01:32:22PM +0100, Denis PILAT wrote:
>> Hi,
>> 
>> We have a bug in one of our gdb target, when the binary changed while
>> beeing debugged it appears that some of our varobj refers to invalid
>> symbols or type.

And what kind of problems does it cause, for the record? I'd expect that
attempt of evaluating such expressions will result in value being "",
and in_scope="false". Do you get anything worse than that?

>> 
>> I propose a patch that delete all varobj when symbols are reloaded. May
>> be there is a better place to do that but I think we must do that
>> somewhere, don't you ?
> 
> The right thing to do is probably to figure out where the
> invalid references come from and fix them - probably by re-evaluating
> expressions at the next -var-update.  Deleting things behind the front
> end's back is a bad policy.

Or maybe, implement "binary changed" MI notification that can be used
by the frontend as it sees fit.

- Volodya