nptl_db/td_ta_get_nthreads.c

   1 /* Get the number of threads in the process.
   2    Copyright (C) 1999-2017 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
  22 td_err_e
  23 td_ta_get_nthreads (const td_thragent_t *ta_arg, int *np)
  24 {
  25   td_thragent_t *const ta = (td_thragent_t *) ta_arg;
  26   td_err_e err;
  27   psaddr_t n;
  28
  29   LOG ("td_ta_get_nthreads");
  30
  31   /* Test whether the TA parameter is ok.  */
  32   if (! ta_ok (ta))
  33     return TD_BADTA;
  34
  35   /* Access the variable in the inferior that tells us.  */
  36   err = DB_GET_VALUE (n, ta, __nptl_nthreads, 0);
  37   if (err == TD_OK)
  38     *np = (uintptr_t) n;
  39
  40   return err;
  41 }