linuxthreads_db/td_thr_get_info.c

   1 /* Get thread information.
   2    Copyright (C) 1999 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 Library General Public License as
   8    published by the Free Software Foundation; either version 2 of the
   9    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    Library General Public License for more details.
  15
  16    You should have received a copy of the GNU Library General Public
  17    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  18    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #include <stddef.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 (__FUNCTION__);
  32
  33   /* Get the thread descriptor.  */
  34   if (ps_pdread (th->th_ta_p->ph, th->th_unique, &pds,
  35                  th->th_ta_p->sizeof_descr) != PS_OK)
  36     return TD_ERR;      /* XXX Other error value?  */
  37
  38   /* Fill in information.  Clear first to provide reproducable
  39      results for the fields we do not fill in.  */
  40   memset (infop, '\0', sizeof (td_thrinfo_t));
  41
  42   infop->ti_ta_p = th->th_ta_p;
  43   infop->ti_tid = pds.p_tid;
  44   infop->ti_tls = (char *) pds.p_specific;
  45   infop->ti_pri = pds.p_priority;
  46   /* The first thread (0 being the initial one) is the manager thread
  47      Mark it appropriately.  */
  48   infop->ti_type = ((pds.p_tid % th->th_ta_p->pthread_threads_max) == 1
  49                     ? TD_THR_SYSTEM : TD_THR_USER);
  50
  51   /* We can get the following information only if the thread descriptor
  52      in the target processor is large enough, i.e., comes from a recent
  53      enough library.  */
  54   if (offsetof (struct _pthread_descr_struct, p_startfct)
  55       < th->th_ta_p->sizeof_descr)
  56     infop->ti_startfunc = pds.p_startfct;
  57
  58   return TD_OK;
  59 }