Re: Leak Sanitizer - how to suppress leaks

[Marc Balmer <mhbalmer%gmail.com@localhost>]

Doesn‘t exit clear all resources on posix systems?

> Am 15.09.2019 um 21:42 schrieb David Holland <dholland-tech%netbsd.org@localhost>:
> 
>> On Fri, Sep 13, 2019 at 07:03:40PM +0700, Robert Elz wrote:
>> It isn't so much that I think we need to save the cost of doing
>> the free() (though for ps it turns out to be harder than you'd expect
>> to actually get it right) but whether it is worth anyone time and
>> effort to actually work out what is needed (if anything at all).  Since
>> ps simply exits, we know there is no real leak, only the illusion of
>> one very briefly.
> 
> Keep in mind, though, that one of the roles of NetBSD has always been
> to serve as a reference implementation.
> 
> There have been OSes in the past where memory not freed yet at process
> exit is _not_ freed by the system, and there might be again, and in
> cases where it isn't expensive to do so it seems that we may as well
> tidy up properly so that the code will run acceptably on such OSes.
> 
> In cases where it _is_ expensive, or at least where it's expensive to
> figure out, the same argument applies as against garbage collection:
> if you aren't sure what the lifetime of that object is, and the
> program isn't structured in a way that allows being reasomably sure it
> is disposed of exactly once, how can you have confidence in any other
> correctness properties?
> 
> -- 
> David A. Holland
> dholland%netbsd.org@localhost