[Bug nptl/9804] pthread_exit from main thread: poor semantics, potential tty session lockup.

["kkylheku at gmail dot com" <sourceware-bugzilla at sourceware dot org>]

------- Additional Comments From kkylheku at gmail dot com  2009-02-01 21:14 -------
I now have a kernel patch that solves this for me.

I modified the sys_exit system call to cause the parent thread to wait for all 
the other threads to die.   If, while waiting, the parent thread gets a non-
fatal signal, it returns -ERESTARTSYS. I.e. it's returning from sys_exit, 
which normally does not happen.  This allows the signal handling to be done 
and sys_exit to be restarted.  If a fatal signal happens, then the exit goes 
through.

This appears to be working perfectly for me. I can now suspend and resume the 
process even if the main thread has already terminated with pthread_exit. All 
of the threads suspend and resume properly. There is no hang.

I am marking this bug WONTFIX, because it's positively, definitely a kernel 
problem that requires no glibc changes. The kernel is simply not doing its 
part in supporting the semantics of pthread_exit from the primary thread.

Cheers.







-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |WONTFIX


http://sourceware.org/bugzilla/show_bug.cgi?id=9804

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