Re: _cthread_init_routine and _cthread_exit_routine

[Neal H. Walfield]

At Wed,  4 May 2005 15:12:34 -0700 (PDT),
Roland McGrath wrote:
> 
> > At Wed,  4 May 2005 14:07:41 -0700 (PDT),
> > Roland McGrath wrote:
> > > 
> > > There isn't any big issue with _cthread_exit_routine, because it doesn't
> > > need to be set so early.  Your initializer code (DSO initializer, or your
> > > _cthread_init_routine function) can just assign _cthread_exit_routine.
> > > 
> > 
> > Good point.  Does that mean glibc should be to actually call
> > _cthread_exit_initializer?  Should I file a bug report?
> 
> Huh?  I just described why no further libc change is required.

In my second email, I asked two questions: 1) does the same treatment
that you have suggested need to be applied to _cthread_exit_routine
and 2) _cthread_exit_routine is never called should we fix it.  As I
understood your reply, you responded to the first but said nothing
with respect to the second.  Basically,

  [a]s far as I can tell, _cthread_exit_routine is not currently called
  when the main thread exits as libc/sysdeps/mach/start.c would seem
  to suggest: we use libc/sysdeps/generic/libc-start.c (which is
  called by libc/sysdeps/i386/elf/start.S) to call main.  This isn't a
  problem for libpthread as libpthread doesn't use this call back.
  libcthreads, on the other hand, does to wait until all other threads
  have exited.

Thanks,
Neal