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Re: Bug#411069: Not so random endless loop/crash

Le jeudi 15 février 2007 à 19:20 +0100, Marco Nenciarini a écrit :
> Package: puf
> Version: 1.0.0-3
> Severity: important
> I've found that puf crashes almost all the time when attempts to do a
> recursive fetch like
> puf -r http://www.htdig.org/files
> This ends in an endless loop after some file downloaded (n < 10) on
> all my machine (all i386).
> I've tried to find the problem and i've found that the url.c source
> causes the error if is compiled with -ON for N >= 1 with gcc-4.1. If
> compiled with -O0 all works ok wathever is the optimization settings
> for other source objects.
> The error (a s = s->next disappaired) is on the line containing h_find
> (a macro defined in puf.h) in the first function of file (find_url).
> I've investigated a lot on this problem, but i've not found a solution
> other then disabling the optimization at all.

Without presuming because I haven't tested it, it is likely to be caused
by the compiler optimizing the static global variables, while the
software is relying on signals. If you don't want these variables to be
optimized out, you must use the "volatile" keyword.

: :' :      We are debian.org. Lower your prices, surrender your code.
`. `'       We will add your hardware and software distinctiveness to
  `-        our own. Resistance is futile.

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