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76a50749 | 1 | /* Validate a thread handle. |
f39f0b93 | 2 | Copyright (C) 1999, 2001, 2002, 2003 Free Software Foundation, Inc. |
76a50749 UD |
3 | This file is part of the GNU C Library. |
4 | Contributed by Ulrich Drepper <drepper@redhat.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 "thread_dbP.h" | |
22 | ||
23 | ||
24 | static td_err_e | |
25 | check_thread_list (const td_thrhandle_t *th, psaddr_t head) | |
26 | { | |
7f08f55a RM |
27 | td_err_e err; |
28 | psaddr_t next, ofs; | |
29 | ||
30 | err = DB_GET_FIELD (next, th->th_ta_p, head, list_t, next, 0); | |
31 | if (err == TD_OK) | |
32 | { | |
33 | if (next == 0) | |
34 | return TD_NOTHR; | |
35 | err = DB_GET_FIELD_ADDRESS (ofs, th->th_ta_p, 0, pthread, list, 0); | |
36 | } | |
37 | ||
38 | while (err == TD_OK) | |
39 | { | |
40 | if (next == head) | |
41 | return TD_NOTHR; | |
42 | ||
43 | if (next - (ofs - (psaddr_t) 0) == th->th_unique) | |
44 | return TD_OK; | |
45 | ||
46 | err = DB_GET_FIELD (next, th->th_ta_p, next, list_t, next, 0); | |
47 | } | |
48 | ||
49 | return err; | |
76a50749 UD |
50 | } |
51 | ||
52 | ||
53 | td_err_e | |
54 | td_thr_validate (const td_thrhandle_t *th) | |
55 | { | |
7f08f55a RM |
56 | td_err_e err; |
57 | psaddr_t list; | |
58 | ||
76a50749 UD |
59 | LOG ("td_thr_validate"); |
60 | ||
61 | /* First check the list with threads using user allocated stacks. */ | |
7f08f55a RM |
62 | err = DB_GET_SYMBOL (list, th->th_ta_p, __stack_user); |
63 | if (err == TD_OK) | |
64 | err = check_thread_list (th, list); | |
76a50749 UD |
65 | |
66 | /* If our thread is not on this list search the list with stack | |
67 | using implementation allocated stacks. */ | |
7f08f55a RM |
68 | if (err == TD_NOTHR) |
69 | { | |
70 | err = DB_GET_SYMBOL (list, th->th_ta_p, stack_used); | |
71 | if (err == TD_OK) | |
72 | err = check_thread_list (th, list); | |
73 | } | |
76a50749 | 74 | |
7f08f55a | 75 | return err; |
76a50749 | 76 | } |