[PATCH] pipe2 for Linuxulator

[Alexander Leidinger]

On Sun, 15 Apr 2012 19:04:08 +0000 Alexander Best <arundel at freebsd.org>
wrote:

> On Sun Apr 15 12, Alexander Leidinger wrote:
> > On Sun, 15 Apr 2012 18:16:13 +0000 Alexander Best
> > <arundel at freebsd.org> wrote:

> > > also...even after installing a fresh kernel and world with dtrace
> > > enabled, the "check_error.d" and "trace_futexes.d" fail and
> > > sometimes even render the flash instance unusable.
> > 
> > I assume with unusable you mean not fast enough. Well... buy a
> > faster CPU. No, just kidding. Depending on what a D script does and
> > how many probes are enabled in the D script, it is not unexpected
> > that the system slows down. As told above, the scripts show what is
> > possible. For real debugging you may want to use stripped down
> > versions.
> 
> no actually. what i meant by "unusable" is that the d-scripts
> themself crash the flash instances.

Uhm... this is unexpected. DTrace disables destructive actions by
default, and I do not activate them. Maybe some timing-sensitive code
in the flash-player which does not handle the case that some parts can
take longer than expected? I assume there is not bug in DTrace itself.
There could be a bug in my patch, but I would assume it is not a
heisen-bug as described here (the probes are handled by
DTrace-macros, just the variables which are provided to D scripts
are different from other probes).

Bye,
Alexander.

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