进程间共享的问题

apony

glibc2.5:

/* Copyright (C) 1991, 1997, 2002, 2004, 2006 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#include <stdarg.h>
#include <stdio.h>
#include <libioP.h>


/* Write formatted output to STREAM from the format string FORMAT.  */
/* VARARGS2 */
int
__fprintf (FILE *stream, const char *format, ...)
{
  va_list arg;
  int done;

  va_start (arg, format);
  done = vfprintf (stream, format, arg);
  va_end (arg);

  return done;
}
ldbl_hidden_def (__fprintf, fprintf)
ldbl_strong_alias (__fprintf, fprintf)

/* We define the function with the real name here.  But deep down in
   libio the original function _IO_fprintf is also needed.  So make
   an alias.  */
ldbl_weak_alias (__fprintf, _IO_fprintf)


#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sysdep.h>
#include "exit.h"

#include "set-hooks.h"
DEFINE_HOOK (__libc_atexit, (void))


/* Call all functions registered with `atexit' and `on_exit',
   in the reverse of the order in which they were registered
   perform stdio cleanup, and terminate program execution with STATUS.  */
void
exit (int status)
{
  /* We do it this way to handle recursive calls to exit () made by
     the functions registered with `atexit' and `on_exit'. We call
     everyone on the list and use the status value in the last
     exit (). */
  while (__exit_funcs != NULL)
    {
      struct exit_function_list *old;

      while (__exit_funcs->idx > 0)
        {
          const struct exit_function *const f =
            &__exit_funcs->fns[--__exit_funcs->idx];
          switch (f->flavor)
            {
              void (*atfct) (void);
              void (*onfct) (int status, void *arg);
              void (*cxafct) (void *arg, int status);

            case ef_free:
            case ef_us:
              break;
            case ef_on:
              onfct = f->func.on.fn;
#ifdef PTR_DEMANGLE
              PTR_DEMANGLE (onfct);
#endif
              onfct (status, f->func.on.arg);
              break;
            case ef_at:
              atfct = f->func.at;
#ifdef PTR_DEMANGLE
              PTR_DEMANGLE (atfct);
#endif
              atfct ();
              break;
            case ef_cxa:
              cxafct = f->func.cxa.fn;
#ifdef PTR_DEMANGLE
              PTR_DEMANGLE (cxafct);
#endif
              cxafct (f->func.cxa.arg, status);
              break;
            }
        }

      old = __exit_funcs;
      __exit_funcs = __exit_funcs->next;
      if (__exit_funcs != NULL)
        /* Don't free the last element in the chain, this is the statically
           allocate element.  */
        free (old);
    }

  RUN_HOOK (__libc_atexit, ());

  _exit (status);
}
libc_hidden_def (exit)

塑料袋

怎么就把分给我了啊，
我也不知道为什么exit非inline，但是返回地址却没入栈啊