1/* Iterate over a process's thread-specific data.
2 Copyright (C) 1999-2022 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <stdint.h>
20#include "thread_dbP.h"
21#include <alloca.h>
22
23td_err_e
24td_ta_tsd_iter (const td_thragent_t *ta_arg, td_key_iter_f *callback,
25 void *cbdata_p)
26{
27 td_thragent_t *const ta = (td_thragent_t *) ta_arg;
28 td_err_e err;
29 void *keys;
30 size_t keys_nb, keys_elemsize;
31 psaddr_t addr;
32 uint32_t idx;
33
34 LOG ("td_ta_tsd_iter");
35
36 /* Test whether the TA parameter is ok. */
37 if (! ta_ok (ta))
38 return TD_BADTA;
39
40 /* This makes sure we have the size information on hand. */
41 addr = 0;
42 err = _td_locate_field (ta,
43 ta->ta_var___pthread_keys, SYM_DESC___pthread_keys,
44 (psaddr_t) 0 + 1, &addr);
45 if (err != TD_OK)
46 return err;
47
48 /* Now copy in the entire array of key descriptors. */
49 keys_elemsize = (addr - (psaddr_t) 0) / 8;
50 keys_nb = keys_elemsize * DB_DESC_NELEM (ta->ta_var___pthread_keys);
51 keys = __alloca (keys_nb);
52 err = DB_GET_SYMBOL (addr, ta, __pthread_keys);
53 if (err != TD_OK)
54 return err;
55 if (ps_pdread (ta->ph, addr, keys, keys_nb) != PS_OK)
56 return TD_ERR;
57
58 /* Now get all descriptors, one after the other. */
59 for (idx = 0; idx < DB_DESC_NELEM (ta->ta_var___pthread_keys); ++idx)
60 {
61 psaddr_t seq, destr;
62 err = DB_GET_FIELD_LOCAL (seq, ta, keys, pthread_key_struct, seq, 0);
63 if (err != TD_OK)
64 return err;
65 if (((uintptr_t) seq) & 1)
66 {
67 err = DB_GET_FIELD_LOCAL (destr, ta, keys, pthread_key_struct,
68 destr, 0);
69 if (err != TD_OK)
70 return err;
71 /* Return with an error if the callback returns a nonzero value. */
72 if (callback ((thread_key_t) idx, destr, cbdata_p) != 0)
73 return TD_DBERR;
74 }
75 /* Advance to the next element in the copied array. */
76 keys += keys_elemsize;
77 }
78
79 return TD_OK;
80}
81