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.
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 "thread_dbP.h"
21
22
23 td_err_e
td_thr_validate(const td_thrhandle_t * th)24 td_thr_validate (const td_thrhandle_t *th)
25 {
26 struct pthread_handle_struct *handles = th->th_ta_p->handles;
27 int pthread_threads_max = th->th_ta_p->pthread_threads_max;
28 int cnt;
29 struct pthread_handle_struct phc;
30
31 LOG ("td_thr_validate");
32
33 /* A special case: if the program just starts up the handle is
34 NULL. */
35 if (th->th_unique == NULL)
36 {
37 /* Read the first handle. If the pointer to the thread
38 descriptor is not NULL this is an error. */
39 if (ps_pdread (th->th_ta_p->ph, handles, &phc,
40 sizeof (struct pthread_handle_struct)) != PS_OK)
41 return TD_ERR; /* XXX Other error value? */
42
43 return phc.h_descr == NULL ? TD_OK : TD_NOTHR;
44 }
45
46 /* Now get all descriptors, one after the other. */
47 for (cnt = 0; cnt < pthread_threads_max; ++cnt, ++handles)
48 {
49 if (ps_pdread (th->th_ta_p->ph, handles, &phc,
50 sizeof (struct pthread_handle_struct)) != PS_OK)
51 return TD_ERR; /* XXX Other error value? */
52
53 if (phc.h_descr != NULL && phc.h_descr == th->th_unique)
54 {
55 struct _pthread_descr_struct pds;
56
57 if (ps_pdread (th->th_ta_p->ph, phc.h_descr, &pds,
58 th->th_ta_p->sizeof_descr) != PS_OK)
59 return TD_ERR; /* XXX Other error value? */
60
61 /* XXX There should be another test using the TID but this is
62 currently not available. */
63 return pds.p_terminated != 0 ? TD_NOTHR : TD_OK;
64 }
65 }
66
67 return TD_ERR;
68 }
69