[petsc-dev] CheckPointer

[Matthew Knepley]

On Mon, Sep 30, 2013 at 12:25 PM, Jim Fonseca <jefonseca at gmail.com> wrote:

> Hi,
> Does anyone have an update on PetscCheckPointer?
>

Jed pushed a fix for this.

   Matt


> Thanks,
> Jim
>
>
> On Wed, Sep 11, 2013 at 12:14 PM, Dave May <dave.mayhem23 at gmail.com>wrote:
>
>> I would be much happier with run-time as well, but I could also live with
>> a reconfigure (it's just one MORE petsc build on my machine :D).
>>
>> What ever can be done to fix this issue would be appreciated.
>>
>> Cheers,
>>   Dave
>>
>>
>> On 11 September 2013 18:12, Jed Brown <jedbrown at mcs.anl.gov> wrote:
>>
>>> Dave May <dave.mayhem23 at gmail.com> writes:
>>>
>>> > Yes, being able to optionally turn off the full memory checking
>>> (either run
>>> > time or via a configuration flag) in MatSetValues() would be good
>>> enough.
>>>
>>> I'd rather make everything run-time unless it absolutely must be
>>> configure time because it sucks to reconfigure (and possibly rebuild
>>> downstream libraries/packages).
>>>
>>> > Presumably when the full error checking wasn't being used, the error
>>> > checking should revert to using the old style memory checking (e.g.
>>> ptr != 0)
>>> > as was used in version 3.2 (and maybe 3.3, I cannot recall).
>>>
>>> Yes.  As far as I'm concerned, it should also try to dereference it so
>>> that a SEGV occurs early rather than later.  The only difference between
>>> safe and fast mode is that the SEGV in safe mode is caught by a friendly
>>> signal handler than cleans up and returns so that a normal error can be
>>> propagated.
>>>
>>
>>
>
>
> --
> Jim Fonseca, PhD
> Research Scientist
> Network for Computational Nanotechnology
> Purdue University
> 765-496-6495
> www.jimfonseca.com
>
>
>


-- 
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which their
experiments lead.
-- Norbert Wiener
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