On May 8, 2014, at 2:50 PM, Eric Christopher <[email protected]> wrote:

> Basically the only way this would be a problem is if FreeBSD doesn't
> ship debug info for part of the libraries (which is, I believe, the
> problem that Adrian ran into on OSX and dtrace/kernel modules). The
> lldb "problem" is just a bug there. I.e. if you have clang build all
> of the debug info for all of your binaries then it should work just
> fine.
> 
> Adrian: Did I miss anything on the problems you were seeing?

As far as I can tell (and Greg’s first reply in the lldb-dev thread seems to 
agree with this), your summary is accurate. LLDB should not crash if there is 
complete debug information available. It will perform very badly because it 
will have to search the DWARF for every compile unit for the complete 
definition, but as far as I understand it, it is not supposed the crash (as 
long as the definition for that class actually is somewhere). Other consumers 
like ctfconvert (aka dtrace), however, cannot deal with this at all, which is 
the other reason why we decided to disable this by default on Darwin.

-- adrian

> 
> -eric
> 
> On Thu, May 8, 2014 at 2:48 PM, Ed Maste <[email protected]> wrote:
>> On 8 May 2014 17:29, David Blaikie <[email protected]> wrote:
>>> 
>>> Ugh. Didn't realize LLDB still had that assert text there. That's
>>> grossly misleading.
>> 
>> Note though that I didn't encounter LLDB's "suggestion" in the path I
>> took to the clang assertion.  Perhaps it's a difference between
>> forward declarations (as in the mailing list thread) vs. the "debug
>> info only where the vtable is" optimization that I presumably
>> encountered.


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