linuxthreads_db/td_thr_get_info.c

   1 /* Get thread information.
   2    Copyright (C) 1999, 2000, 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, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #include <stddef.h>
  22 #include <string.h>
  23
  24 #include "thread_dbP.h"
  25
  26
  27 td_err_e
  28 td_thr_get_info (const td_thrhandle_t *th, td_thrinfo_t *infop)
  29 {
  30   struct _pthread_descr_struct pds;
  31
  32   LOG ("td_thr_get_info");
  33
  34   /* Handle the case when the thread library is not yet initialized.  */
  35   if (th->th_unique == NULL)
  36     {
  37       memset (&pds, '\0', sizeof (pds));
  38       pds.p_tid = PTHREAD_THREADS_MAX;
  39     }
  40   else
  41     /* Get the thread descriptor.  */
  42     if (ps_pdread (th->th_ta_p->ph, th->th_unique, &pds,
  43                    th->th_ta_p->sizeof_descr) != PS_OK)
  44       return TD_ERR;    /* XXX Other error value?  */
  45
  46   /* Fill in information.  Clear first to provide reproducable
  47      results for the fields we do not fill in.  */
  48   memset (infop, '\0', sizeof (td_thrinfo_t));
  49
  50   /* We have to handle the manager thread special since the thread
  51      descriptor in older versions is not fully initialized.  */
  52   if (pds.p_nr == 1)
  53     {
  54       infop->ti_tid = th->th_ta_p->pthread_threads_max * 2 + 1;
  55       infop->ti_type = TD_THR_SYSTEM;
  56       infop->ti_state = TD_THR_ACTIVE;
  57     }
  58   else
  59     {
  60       infop->ti_tid = pds.p_tid;
  61       infop->ti_tls = (char *) pds.p_specific;
  62       infop->ti_pri = pds.p_priority;
  63       infop->ti_type = TD_THR_USER;
  64
  65       if (! pds.p_terminated)
  66         /* XXX For now there is no way to get more information.  */
  67         infop->ti_state = TD_THR_ACTIVE;
  68       else if (! pds.p_detached)
  69         infop->ti_state = TD_THR_ZOMBIE;
  70       else
  71         infop->ti_state = TD_THR_UNKNOWN;
  72     }
  73
  74   /* Initialization which are the same in both cases.  */
  75   infop->ti_lid = pds.p_pid ?: ps_getpid (th->th_ta_p->ph);
  76   infop->ti_ta_p = th->th_ta_p;
  77   infop->ti_startfunc = pds.p_start_args.start_routine;
  78   memcpy (&infop->ti_events, &pds.p_eventbuf.eventmask,
  79           sizeof (td_thr_events_t));
  80   infop->ti_traceme = pds.p_report_events != 0;
  81
  82   return TD_OK;
  83 }