cat /proc/registry/HKEY_PERFOMANCE_DATA/@ hangs

[Igor Pechtchanski]

I don't think it matters.  I get the same exact results with both sh and
bash in any one of the cmd window, xterm, or rxvt.  FWIW, the output below
was with cmd/bash.  You *are* trying the latest snapshot, right?

I'm not sure I understand what "there are no problems -- it just echos
what I typed if it can't access what I want" means, either.  The point is
that it's *supposed* to be able to access that registry key.
	Igor
P.S. <http://cygwin.com/acronyms/#PCYMTNQREAIYR>.

On Mon, 19 Jul 2004, Robert Pendell wrote:

> I have no clue if anyone thought to bring this up but how about
> telling us what combination shell and console that you use.
>
> Example:
> I use rxvt and bash combination (rxvt is console / bash is shell) and
> there are no problems -- it just echos what I typed if it can't access
> what I want.  If I start up sh though within that session and run the
> same command 'cat' will show the same problem as what started this
> thread from the start.
>
> On Mon, 19 Jul 2004 14:36:40 -0400 (EDT), Igor Pechtchanski <pechtcha@XX.XXX.XXX> wrote:
> > On Mon, 19 Jul 2004, Chris January wrote:
> >
> > > > However, the fix is not as simple as inserting a "size =
> > > > bufalloc;" just before the RegQueryValueEx.  When I do that,
> > > > I get a SIGSEGV in the guts of iasperf.dll, which I have yet
> > > > to track down.  This happens on the second iteration, FWIW,
> > > > with buffer increment of 1000.  I'm going to investigate some
> > > > more, but I'd say that with the above bug, this key was never
> > > > tested, so I have no idea what's going on.  Hopefully Chris
> > > > (January) can use this to help him track down the problem.
> > >
> > > I'm back from my honeymoon (!)
> >
> > Great, hope you enjoyed it...
> >
> > > and I've just been catching up on this thread.
> >
> > ...and I'm sure you didn't enjoy this. :-)
> >
> > > Are you still seeing the segfault Igor? If so I'll try to track it down
> > > if I have any spare time.
> >
> > Yes, I'm still seeing the segfault in the latest snapshot, but only when
> > run under gdb or strace.  Here are some sample tests:
> >
> > $ cat /proc/registry/HKEY_PERFORMANCE_DATA/\@ > e.out
> > cat: /proc/registry/HKEY_PERFORMANCE_DATA/@: No such file or directory
> > $ # no segfault
> > $ strace -o cat_HKPD.strace cat /proc/registry/HKEY_PERFORMANCE_DATA/\@ > e.out
> > 2262669 [main] cat 2400 handle_exceptions: Exception: STATUS_ACCESS_VIOLATION
> > 2264445 [main] cat 2400 open_stackdumpfile: Dumping stack trace to cat.exe.stackdump
> > $
> >
> > I can also send you cat_HKPD.strace, but it's not very informative.  Let
> > me know if you can't reproduce this and need me to debug this locally.
> > FWIW, I have a working piece of Win32 code that does read this key
> > correctly (essentially a stripped down MS example).  Let me know if you
> > need it.
> >
> > > As you can probably tell I never tested the HKEY_PERFORMANCE_DATA key.
> >
> > Yep, so I surmised.
> >
> > > Increasing the buffer size in increments is of course boilerplate code
> > > but I managed to cod it up regardless. Sigh.
> > >
> > > Chris January

-- 
				http://cs.nyu.edu/~pechtcha/
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ZZZzz /,`.-'`'    -.  ;-;;,_		igor@watson.ibm.com
     |,4-  ) )-,_. ,\ (  `'-'		Igor Pechtchanski, Ph.D.
    '---''(_/--'  `-'\_) fL	a.k.a JaguaR-R-R-r-r-r-.-.-.  Meow!

"I have since come to realize that being between your mentor and his route
to the bathroom is a major career booster."  -- Patrick Naughton

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