1: /* Iterate over a process's thread-specific data.
    2:    Copyright (C) 1999,2000,2001,2002,2003 Free Software Foundation, Inc.
    3:    This file is part of the GNU C Library.
    4:    Contributed by Ulrich Drepper <drepper@redhat.com>, 1999.
    5: 
    6:    The GNU C Library is free software; you can redistribute it and/or
    7:    modify it under the terms of the GNU Lesser General Public
    8:    License as published by the Free Software Foundation; either
    9:    version 2.1 of the License, or (at your option) any later version.
   10: 
   11:    The GNU C Library is distributed in the hope that it will be useful,
   12:    but WITHOUT ANY WARRANTY; without even the implied warranty of
   13:    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   14:    Lesser General Public License for more details.
   15: 
   16:    You should have received a copy of the GNU Lesser General Public
   17:    License along with the GNU C Library; if not, write to the Free
   18:    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   19:    02111-1307 USA.  */
   20: 
   21: #include "thread_dbP.h"
   22: #include <alloca.h>
   23: 
   24: td_err_e
   25: td_ta_tsd_iter (const td_thragent_t *ta_arg, td_key_iter_f *callback,
   26:                 void *cbdata_p)
   27: {
   28:   td_thragent_t *const ta = (td_thragent_t *) ta_arg;
   29:   td_err_e err;
   30:   void *keys;
   31:   size_t keys_nb, keys_elemsize;
   32:   psaddr_t addr;
   33:   uint32_t idx;
   34: 
   35:   LOG ("td_ta_tsd_iter");
   36: 
   37:   /* Test whether the TA parameter is ok.  */
   38:   if (! ta_ok (ta))
   39:     return TD_BADTA;
   40: 
   41:   /* This makes sure we have the size information on hand.  */
   42:   addr = 0;
   43:   err = _td_locate_field (ta,
   44:                           ta->ta_var___pthread_keys, SYM_DESC___pthread_keys,
   45:                           (psaddr_t) 0 + 1, &addr);
   46:   if (err != TD_OK)
   47:     return err;
   48: 
   49:   /* Now copy in the entire array of key descriptors.  */
   50:   keys_elemsize = (addr - (psaddr_t) 0) / 8;
   51:   keys_nb = keys_elemsize * DB_DESC_NELEM (ta->ta_var___pthread_keys);
   52:   keys = __alloca (keys_nb);
   53:   err = DB_GET_SYMBOL (addr, ta, __pthread_keys);
   54:   if (err != TD_OK)
   55:     return err;
   56:   if (ps_pdread (ta->ph, addr, keys, keys_nb) != PS_OK)
   57:     return TD_ERR;
   58: 
   59:   /* Now get all descriptors, one after the other.  */
   60:   for (idx = 0; idx < DB_DESC_NELEM (ta->ta_var___pthread_keys); ++idx)
   61:     {
   62:       psaddr_t seq, destr;
   63:       err = DB_GET_FIELD_LOCAL (seq, ta, keys, pthread_key_struct, seq, 0);
   64:       if (err != TD_OK)
   65:         return err;
   66:       if (((uintptr_t) seq) & 1)
   67:         {
   68:           err = DB_GET_FIELD_LOCAL (destr, ta, keys, pthread_key_struct,
   69:                                     destr, 0);
   70:           if (err != TD_OK)
   71:             return err;
   72:           /* Return with an error if the callback returns a nonzero value.  */
   73:           if (callback ((thread_key_t) idx, destr, cbdata_p) != 0)
   74:             return TD_DBERR;
   75:         }
   76:       /* Advance to the next element in the copied array.  */
   77:       keys += keys_elemsize;
   78:     }
   79: 
   80:   return TD_OK;
   81: }