nptl_db/td_ta_tsd_iter.c

   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, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include "thread_dbP.h"
  21 #include <alloca.h>
  22
  23 td_err_e
  24 td_ta_tsd_iter (const td_thragent_t *ta_arg, td_key_iter_f *callback,
  25                 void *cbdata_p)
  26 {
  27   td_thragent_t *const ta = (td_thragent_t *) ta_arg;
  28   td_err_e err;
  29   void *keys;
  30   size_t keys_nb, keys_elemsize;
  31   psaddr_t addr;
  32   uint32_t idx;
  33
  34   LOG ("td_ta_tsd_iter");
  35
  36   /* Test whether the TA parameter is ok.  */
  37   if (! ta_ok (ta))
  38     return TD_BADTA;
  39
  40   /* This makes sure we have the size information on hand.  */
  41   addr = 0;
  42   err = _td_locate_field (ta,
  43                           ta->ta_var___pthread_keys, SYM_DESC___pthread_keys,
  44                           (psaddr_t) 0 + 1, &addr);
  45   if (err != TD_OK)
  46     return err;
  47
  48   /* Now copy in the entire array of key descriptors.  */
  49   keys_elemsize = (addr - (psaddr_t) 0) / 8;
  50   keys_nb = keys_elemsize * DB_DESC_NELEM (ta->ta_var___pthread_keys);
  51   keys = __alloca (keys_nb);
  52   err = DB_GET_SYMBOL (addr, ta, __pthread_keys);
  53   if (err != TD_OK)
  54     return err;
  55   if (ps_pdread (ta->ph, addr, keys, keys_nb) != PS_OK)
  56     return TD_ERR;
  57
  58   /* Now get all descriptors, one after the other.  */
  59   for (idx = 0; idx < DB_DESC_NELEM (ta->ta_var___pthread_keys); ++idx)
  60     {
  61       psaddr_t seq, destr;
  62       err = DB_GET_FIELD_LOCAL (seq, ta, keys, pthread_key_struct, seq, 0);
  63       if (err != TD_OK)
  64         return err;
  65       if (((uintptr_t) seq) & 1)
  66         {
  67           err = DB_GET_FIELD_LOCAL (destr, ta, keys, pthread_key_struct,
  68                                     destr, 0);
  69           if (err != TD_OK)
  70             return err;
  71           /* Return with an error if the callback returns a nonzero value.  */
  72           if (callback ((thread_key_t) idx, destr, cbdata_p) != 0)
  73             return TD_DBERR;
  74         }
  75       /* Advance to the next element in the copied array.  */
  76       keys += keys_elemsize;
  77     }
  78
  79   return TD_OK;
  80 }