Re: (ITS#8988) Undefined Behavior in slapadd

[hyc@symas.com]

noloader@gmail.com wrote:
> On Fri, Jun 7, 2019 at 9:32 AM Howard Chu <hyc@symas.com> wrote:
>>
>> noloader@gmail.com wrote:
>> ...
>>> I encourage OpenLDAP to fix the undefined behavior. OpenLDAP is an
>>> important project, and the undefined behavior is causing too many
>>> tangential problems.
>>
>> Undefined behavior is not a bug, nor is it prohibited by the C spec. It is a necessary
>> part of the language for its intended use as a system programming language, writing
>> machine-specific programs. Anyone who says it is prohibited by the spec is wrong.
> 
> I don't believe this is correct.
> 
> Maybe you are thinking of implementation defined behavior?

That would apply to how a particular compiler implementation treats some piece of code.
Whether a CPU supports unaligned access is machine-defined. Since our code is already
properly ifdef'd for the machines which do or don't support it, the fact that this is
"non-portable" is not an issue.

-- 
  -- Howard Chu
  CTO, Symas Corp.           http://www.symas.com
  Director, Highland Sun     http://highlandsun.com/hyc/
  Chief Architect, OpenLDAP  http://www.openldap.org/project/