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