libpthread/linuxthreads_db/td_thr_event_enable.c

   1 /* Enable event process-wide.
   2    Copyright (C) 1999, 2001, 2002 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@cygnus.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 <stddef.h>
  21
  22 #include "thread_dbP.h"
  23
  24
  25 td_err_e
  26 td_thr_event_enable(const td_thrhandle_t *th, int onoff)
  27 {
  28   LOG ("td_thr_event_enable");
  29
  30   /* Write the new value into the thread data structure.  */
  31   if (th->th_unique == NULL)
  32     {
  33       psaddr_t addr;
  34
  35       if (td_lookup (th->th_ta_p->ph, LINUXTHREADS_INITIAL_REPORT_EVENTS,
  36                      &addr) != PS_OK)
  37         /* Cannot read the symbol.  This should not happen.  */
  38         return TD_ERR;
  39
  40       if (ps_pdwrite (th->th_ta_p->ph, addr, &onoff, sizeof (int)) != PS_OK)
  41         return TD_ERR;
  42
  43       return TD_OK;
  44     }
  45
  46   if (ps_pdwrite (th->th_ta_p->ph,
  47                   ((char *) th->th_unique
  48                    + offsetof (struct _pthread_descr_struct,
  49                                p_report_events)),
  50                   &onoff, sizeof (int)) != PS_OK)
  51     return TD_ERR;      /* XXX Other error value?  */
  52
  53   return TD_OK;
  54 }