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Re: Status of revivesa



On Thu, Sep 25, 2008 at 09:36:08PM +0200, Manuel Bouyer wrote:
> On Thu, Sep 25, 2008 at 12:23:03PM -0700, Bill Stouder-Studenmund wrote:
> > Ok. We now set PS_WEXIT a lot later than we used to. Before, we'd set 
> > P_WEXIT (the old value for this flag) in sigexit(). Now we don't.
> > 
> > Also, the thread that decides to core the whole process will not have 
> > LW_WEXIT set on itself. So we have to look at PS_WCORE.
> > 
> > Please try rev 1.91.2.43.
> 
> OK, now it doesn't panic, but named gets a SIGSEGV:
> Sep 25 21:30:36 lavardin-1 named[393]: starting BIND 9.3.0
> Sep 25 21:30:36 lavardin-1 named[393]: found 1 CPU, using 1 worker thread
> Sep 25 21:30:36 lavardin-1 /netbsd: pid 393 (named), uid 0: exited on signal 
> 11 (core dumped)
> 
> named -g -d20 doens't give more details, nor does ktrace:
> [...]
>    388 named    CALL  break(0x819e000)
>    388 named    RET   break 0
>    388 named    CALL  break(0x819f000)
>    388 named    RET   break 0
>    388 named    PSIG  SIGSEGV SIG_DFL: code=SEGV_ACCERR, addr=0x0, trap=4)
>    388 named    NAMI  "named.core"
> 
> gdb says:
> Core was generated by `named'.
> Program terminated with signal 11, Segmentation fault.
> Reading symbols from /usr/libexec/ld.elf_so...(no debugging symbols found)...
> done.
> Loaded symbols for /usr/libexec/ld.elf_so
> Reading symbols from /usr/lib/libpthread.so.0...(no debugging symbols 
> found)...
> done.
> Loaded symbols for /usr/lib/libpthread.so.0
> Reading symbols from /usr/lib/libc.so.12...(no debugging symbols 
> found)...doneLoaded symbols for /usr/lib/libc.so.12
> #0  0xbbbe60a9 in _setcontext_u_s87 () from /usr/lib/libpthread.so.0
> (gdb) where
> #0  0xbbbe60a9 in _setcontext_u_s87 () from /usr/lib/libpthread.so.0
> #1  0xbbbde21c in pthread__upcall_switch () from /usr/lib/libpthread.so.0
> #2  0xbbbe04a5 in pthread__upcall () from /usr/lib/libpthread.so.0
> 
> 
> named has the expected behavior (that is, exit gracefully because there's
> no /etc/named.conf) with NetBSD 3.0 and 4.0 kernels.

Ok. I think something may be wrong in context handling. I hope not, as I 
don't really understand all of it & was hoping it just worked from before.

I'll see how this does on my system tonight.

Take care,

Bill

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