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76a50749 | 1 | /* Validate a thread handle. |
dff8da6b | 2 | Copyright (C) 1999-2024 Free Software Foundation, Inc. |
76a50749 | 3 | This file is part of the GNU C Library. |
76a50749 UD |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 | 16 | License along with the GNU C Library; if not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
76a50749 UD |
18 | |
19 | #include "thread_dbP.h" | |
090addb4 | 20 | #include <stdbool.h> |
76a50749 | 21 | |
1daccf40 FW |
22 | td_err_e |
23 | __td_ta_stack_user (td_thragent_t *ta, psaddr_t *plist) | |
24 | { | |
25 | if (__td_ta_rtld_global (ta)) | |
26 | return DB_GET_FIELD_ADDRESS (*plist, ta, ta->ta_addr__rtld_global, | |
27 | rtld_global, _dl_stack_user, 0); | |
28 | else | |
29 | { | |
30 | if (ta->ta_addr__dl_stack_user == 0 | |
31 | && td_mod_lookup (ta->ph, NULL, SYM__dl_stack_user, | |
32 | &ta->ta_addr__dl_stack_user) != PS_OK) | |
33 | return TD_ERR; | |
34 | *plist = ta->ta_addr__dl_stack_user; | |
35 | return TD_OK; | |
36 | } | |
37 | } | |
38 | ||
39 | td_err_e | |
40 | __td_ta_stack_used (td_thragent_t *ta, psaddr_t *plist) | |
41 | { | |
42 | ||
43 | if (__td_ta_rtld_global (ta)) | |
44 | return DB_GET_FIELD_ADDRESS (*plist, ta, ta->ta_addr__rtld_global, | |
45 | rtld_global, _dl_stack_used, 0); | |
46 | else | |
47 | { | |
48 | if (ta->ta_addr__dl_stack_used == 0 | |
49 | && td_mod_lookup (ta->ph, NULL, SYM__dl_stack_used, | |
50 | &ta->ta_addr__dl_stack_used) != PS_OK) | |
51 | return TD_ERR; | |
52 | *plist = ta->ta_addr__dl_stack_used; | |
53 | return TD_OK; | |
54 | } | |
55 | } | |
56 | ||
76a50749 | 57 | static td_err_e |
090addb4 | 58 | check_thread_list (const td_thrhandle_t *th, psaddr_t head, bool *uninit) |
76a50749 | 59 | { |
7f08f55a RM |
60 | td_err_e err; |
61 | psaddr_t next, ofs; | |
62 | ||
63 | err = DB_GET_FIELD (next, th->th_ta_p, head, list_t, next, 0); | |
64 | if (err == TD_OK) | |
65 | { | |
66 | if (next == 0) | |
090addb4 RM |
67 | { |
68 | *uninit = true; | |
69 | return TD_NOTHR; | |
70 | } | |
7f08f55a RM |
71 | err = DB_GET_FIELD_ADDRESS (ofs, th->th_ta_p, 0, pthread, list, 0); |
72 | } | |
73 | ||
74 | while (err == TD_OK) | |
75 | { | |
76 | if (next == head) | |
77 | return TD_NOTHR; | |
78 | ||
79 | if (next - (ofs - (psaddr_t) 0) == th->th_unique) | |
80 | return TD_OK; | |
81 | ||
82 | err = DB_GET_FIELD (next, th->th_ta_p, next, list_t, next, 0); | |
83 | } | |
84 | ||
85 | return err; | |
76a50749 UD |
86 | } |
87 | ||
88 | ||
89 | td_err_e | |
90 | td_thr_validate (const td_thrhandle_t *th) | |
91 | { | |
7f08f55a RM |
92 | td_err_e err; |
93 | psaddr_t list; | |
94 | ||
76a50749 UD |
95 | LOG ("td_thr_validate"); |
96 | ||
97 | /* First check the list with threads using user allocated stacks. */ | |
090addb4 | 98 | bool uninit = false; |
1daccf40 | 99 | err = __td_ta_stack_user (th->th_ta_p, &list); |
7f08f55a | 100 | if (err == TD_OK) |
090addb4 | 101 | err = check_thread_list (th, list, &uninit); |
76a50749 UD |
102 | |
103 | /* If our thread is not on this list search the list with stack | |
104 | using implementation allocated stacks. */ | |
7f08f55a RM |
105 | if (err == TD_NOTHR) |
106 | { | |
1daccf40 | 107 | err = __td_ta_stack_used (th->th_ta_p, &list); |
7f08f55a | 108 | if (err == TD_OK) |
090addb4 RM |
109 | err = check_thread_list (th, list, &uninit); |
110 | ||
7d9d8bd1 RM |
111 | if (err == TD_NOTHR && uninit && th->th_unique == 0) |
112 | /* __pthread_initialize_minimal has not run yet. | |
113 | There is only the special case thread handle. */ | |
114 | err = TD_OK; | |
7f08f55a | 115 | } |
76a50749 | 116 | |
7f08f55a | 117 | return err; |
76a50749 | 118 | } |