| From: | Greg Stark <stark(at)enterprisedb(dot)com> |
|---|---|
| To: | Martijn van Oosterhout <kleptog(at)svana(dot)org> |
| Cc: | Robert Lor <Robert(dot)Lor(at)sun(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Zdenek Kotala <Zdenek(dot)Kotala(at)sun(dot)com>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: DTrace probes broken in HEAD on Solaris? |
| Date: | 2009-03-24 23:09:51 |
| Message-ID: | 4136ffa0903241609w2324ae33x4a694426fb605a30@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Tue, Mar 24, 2009 at 10:53 PM, Martijn van Oosterhout
<kleptog(at)svana(dot)org> wrote:
> Sorry, I meant to say that the compiler could determine the address at
> compile time, something like:
>
> __builtin_constant_p( !&(__x)) )
Hm, that's a better idea.
How about something like
(__builtin_constant_p(__x) || __builtin_constant_p(!&(__x)))
This would still pass expressions like foo[x] even if x might be
out-of-bounds or foo might be pointed to a freed object or something
like that though.
--
greg
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