Re: Hang on latest kubuntu linux when built with icc

["Vin Shelton" <acs@alumni.princeton.edu>]

On 6/12/06, Peter Stephenson <pws@csr.com> wrote:
> "Vin Shelton" wrote:
> > when I build the latest CVS sources with icc, the Intel C compiler,
> > the shell eventually hangs after running a command but before
> > returning to the prompt.  It usually takes only 1-5 commands before
> > this happens.
> >
> > Here's an strace of zsh -f:
> >...
> > wait4(-1, 0xbfd3ac30, WNOHANG|WSTOPPED, 0xbfd3abd4) = -1 ECHILD (No
> > child processes)
> > sigreturn()                             = ? (mask now ~[HUP KILL CHLD
> > STOP RTMIN])
> > pause()                                 = ? ERESTARTNOHAND (To be restarted)
> > --- SIGHUP (Hangup) @ 0 (0) ---
> >...
> > The SIGHUP is where I killed the shell from another window.
>
> Unfortunately I'm not a signal expert and it really needs someone who
> does this sort of thing regularly.
>
> The pause() looks a bit fishy.  There are two explicit occurrences in
> the code:  I'll assume it's one of these for now.  What strace
> reports might be only distantly related to the source code; still, my
> Fedora Core 4 with 2.6.14 says it's calling rt_sigsuspend(), which
> sounds much more plausible.
>
> One call is here:
>
> #ifdef BROKEN_POSIX_SIGSUSPEND
>     sigprocmask(SIG_SETMASK, &set, &oset);
>     pause();
>     sigprocmask(SIG_SETMASK, &oset, NULL);
> #else /* not BROKEN_POSIX_SIGSUSPEND */
>     ret = sigsuspend(&set);
> #endif /* BROKEN_POSIX_SIGSUSPEND */
>
> and the other is right down at the tail end where we're virtually
> implementing signal suspension from scratch.
>
> I don't think you should be getting either of those... certainly not the
> second, but probably not BROKEN_POSIX_SIGSUSPEND either.  Could you
> check if that's defined?  If it is, try undefining it; the test may need
> tweaking.

Peter,

Thanks for your help.  I'm slightly embarrassed to admit that the
problem was that my system was misconfigured - because I had not added
/opt/intel/compiler/9.0/lib to /etc/ld.so.conf, a dynamic lib could
not be found.  I fixed this in the executable by setting
LD_LIBRARY_PATH before running Src/zsh, by I didn't think that this
would affect the configure tests, too.  Once I added
/opt/intel/compiler/9.0/lib to /etc/ld.so.conf and re-ran ldconfig,
everything worked fine. Previously, BROKEN POSIX_SIGSUSPEND was set,
and no it is not. Zsh is now working fine.

Thanks,
  Vin


-- 
Whoever you are, no matter how lonely,
the world offers itself to your imagination,
calls to you like the wild geese, harsh and exciting--
over and over announcing your place
in the family of things.			Mary Oliver