Synchronize with linux/elf.h.
[glibc.git] / nptl_db / td_ta_tsd_iter.c
blob767af9adfa85a56f74ee34675a8571882825bed1
1 /* Iterate over a process's thread-specific data.
2 Copyright (C) 1999,2000,2001,2002,2003 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@redhat.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, see
18 <http://www.gnu.org/licenses/>. */
20 #include "thread_dbP.h"
21 #include <alloca.h>
23 td_err_e
24 td_ta_tsd_iter (const td_thragent_t *ta_arg, td_key_iter_f *callback,
25 void *cbdata_p)
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;
34 LOG ("td_ta_tsd_iter");
36 /* Test whether the TA parameter is ok. */
37 if (! ta_ok (ta))
38 return TD_BADTA;
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;
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;
58 /* Now get all descriptors, one after the other. */
59 for (idx = 0; idx < DB_DESC_NELEM (ta->ta_var___pthread_keys); ++idx)
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)
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;
75 /* Advance to the next element in the copied array. */
76 keys += keys_elemsize;
79 return TD_OK;