Re: Optimization breaks program

[Paul Schneider]

Robert Heller wrote:
>   Paul Schneider <paulibaer@uboot.com>,
>   In a message on Wed, 28 Apr 2004 12:13:43 +0200, wrote :
>
> PS> With optimization turned to O1, O2, or O3, I get segfaults with my 
> PS> program. With no optimization everything runs fine. Is this a common 
> PS> thing to happen?
>
> Generally not.  Usually there is some *minor* programming error.
>
> Common ones:
>
>         Uninitialized variables (referenced before being set, often
> pointers or indexes).
It interestingly occurs unexpectedly and not reproducably in my main 
loop (it is a numerical application). I put a lot of effort not to use 
any dynamic structures crafted by myself. The only thing I use 
pointerwise is a boost::shared_ptr.


>         Sometimes the declaration of large (or just not trivial sized)
> arrays as 'automatic' (local off the stack).  Change these to 'static'
> storage class (still local).

I'm getting a st9bad_alloc, so this might be worthwhile trying.

Thanks,

Paul