Re: [PATCH] Eliminate -var-create error for optzd ptr to struct

[Pedro Alves <palves@redhat.com>]

On 04/06/2016 10:41 PM, Don Breazeal wrote:
> On 4/6/2016 2:04 AM, Yao Qi wrote:

> Question: in light of Pedro's comments regarding
> gdbscm_value_optimized_out_p and valpy_get_is_optimized_out:
> 
>> A RETURN_MASK_ALL swallows Ctrl-C/QUIT, and that's almost
>> always a bug.  The cases you mention translate a QUIT to
>> a python/scheme exception, which is not the same as just
>> swallowing the exception.
> 
> Would you still like for me to follow up with a patch to remove the
> TRY/CATCH blocks around the calls to value_optimized_out in those two
> functions?  Or do we want to leave it as-is so that the QUIT handling
> remains unchanged?

Please leave them as is.  We need to translate gdb exceptions to Python/Scheme
exceptions at the gdb <-> extension-language boundaries.  Those gdb
functions in question will be returning to the Python/Scheme runtimes, which
are not prepared to unwind correctly on a gdb exception.

Thanks,
Pedro Alves