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Re: cat /proc/registry/HKEY_PERFOMANCE_DATA/@ hangs
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@cs.nyu.edu> 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
>
> HTH,
>
>
> Igor
> --
> http://cs.nyu.edu/~pechtcha/
> |\ _,,,---,,_ pechtcha@cs.nyu.edu
> 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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Robert Pendell
shinji257@gmail.com
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