Subject: Re: Possible changes to POSIX abort()
To: None <tech-userlevel@netbsd.org>
From: der Mouse <mouse@Rodents.Montreal.QC.CA>
List: tech-userlevel
Date: 07/13/2002 07:42:49
>> The argument against this is that in situations where you need to
>> abort(), you have detected an inconsistency and need to bail out
>> immediately and core dump, without touching any state.
Perhaps, and that's probably true of some situations. But there are
many others where it's worth at least _trying_ to flush stdio; most of
the abort() calls I write are can't-happens, and when one of them does
happen it has - so far! - always been light enough damage that flushing
stdio works and is reasonable. (Often it's a logic bug, not, strictly
speaking, data structure corruption at all.)
While the argument
>> Having detected an inconcistency, there's no reason to believe that
>> *any* of your data structures, including stdio streams, aren't also
>> corrupt, so trying to flush streams or do other recovery work will
>> only hurt you.
holds some merit, I know _I_ would like to have something abort()ish
that does at least try to flush stdio. I'd use it far more than I'd
use the version that doesn't.
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