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Re: Optimization breaks program
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From: |
Maurizio Loreti |
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Subject: |
Re: Optimization breaks program |
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Date: |
28 Apr 2004 12:22:02 +0200 |
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User-agent: |
Gnus/5.09 (Gnus v5.9.0) Emacs/21.3 |
Paul Schneider <paulibaer@uboot.com> writes:
> With optimization turned to O1, O2, or O3, I get segfaults with my
> program. With no optimization everything runs fine. Is this a common
> thing to happen?
Yes. The optimizer generates a different memory layout, and may
evidence software errors (uninitialised variables, arrays accessed
out-of-bounds, damaged malloc arena, ...) unnoticed with -O0 .
--
Maurizio Loreti http://www.pd.infn.it/~loreti/mlo.html
Dept. of Physics, Univ. of Padova, Italy ROT13: ybergv@cq.vasa.vg