Update.
[glibc.git] / linuxthreads_db / td_thr_validate.c
blob6f893d3f7fd3be3bbc116dba01785b9744b9f86e
1 /* Validate a thread handle.
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.
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.
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.
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. */
21 #include "thread_dbP.h"
22 #include <linuxthreads/internals.h>
25 td_err_e
26 td_thr_validate (const td_thrhandle_t *th)
28 struct pthread_handle_struct *handles = th->th_ta_p->handles;
29 int pthread_threads_max = th->th_ta_p->pthread_threads_max;
30 int cnt;
31 struct pthread_handle_struct phc;
33 LOG ("td_thr_validate");
35 /* A special case: if the program just starts up the handle is
36 NULL. */
37 if (th->th_unique == NULL)
39 /* Read the first handle. If the pointer to the thread
40 descriptor is not NULL this is an error. */
41 if (ps_pdread (th->th_ta_p->ph, handles, &phc,
42 sizeof (struct pthread_handle_struct)) != PS_OK)
43 return TD_ERR; /* XXX Other error value? */
45 return phc.h_descr == NULL ? TD_OK : TD_NOTHR;
48 /* Now get all descriptors, one after the other. */
49 for (cnt = 0; cnt < pthread_threads_max; ++cnt, ++handles)
51 if (ps_pdread (th->th_ta_p->ph, handles, &phc,
52 sizeof (struct pthread_handle_struct)) != PS_OK)
53 return TD_ERR; /* XXX Other error value? */
55 if (phc.h_descr != NULL && phc.h_descr == th->th_unique)
57 struct _pthread_descr_struct pds;
59 if (ps_pdread (th->th_ta_p->ph, phc.h_descr, &pds,
60 th->th_ta_p->sizeof_descr) != PS_OK)
61 return TD_ERR; /* XXX Other error value? */
63 /* XXX There should be another test using the TID but this is
64 currently not available. */
65 return pds.p_terminated != 0 ? TD_NOTHR : TD_OK;
69 return TD_ERR;