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glibc/nptl_db/td_ta_tsd_iter.c
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/* Iterate over a process's thread-specific data. | |
Copyright (C) 1999-2016 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
Contributed by Ulrich Drepper <drepper@redhat.com>, 1999. | |
The GNU C Library is free software; you can redistribute it and/or | |
modify it under the terms of the GNU Lesser General Public | |
License as published by the Free Software Foundation; either | |
version 2.1 of the License, or (at your option) any later version. | |
The GNU C Library is distributed in the hope that it will be useful, | |
but WITHOUT ANY WARRANTY; without even the implied warranty of | |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
Lesser General Public License for more details. | |
You should have received a copy of the GNU Lesser General Public | |
License along with the GNU C Library; if not, see | |
<http://www.gnu.org/licenses/>. */ | |
#include <stdint.h> | |
#include "thread_dbP.h" | |
#include <alloca.h> | |
td_err_e | |
td_ta_tsd_iter (const td_thragent_t *ta_arg, td_key_iter_f *callback, | |
void *cbdata_p) | |
{ | |
td_thragent_t *const ta = (td_thragent_t *) ta_arg; | |
td_err_e err; | |
void *keys; | |
size_t keys_nb, keys_elemsize; | |
psaddr_t addr; | |
uint32_t idx; | |
LOG ("td_ta_tsd_iter"); | |
/* Test whether the TA parameter is ok. */ | |
if (! ta_ok (ta)) | |
return TD_BADTA; | |
/* This makes sure we have the size information on hand. */ | |
addr = 0; | |
err = _td_locate_field (ta, | |
ta->ta_var___pthread_keys, SYM_DESC___pthread_keys, | |
(psaddr_t) 0 + 1, &addr); | |
if (err != TD_OK) | |
return err; | |
/* Now copy in the entire array of key descriptors. */ | |
keys_elemsize = (addr - (psaddr_t) 0) / 8; | |
keys_nb = keys_elemsize * DB_DESC_NELEM (ta->ta_var___pthread_keys); | |
keys = __alloca (keys_nb); | |
err = DB_GET_SYMBOL (addr, ta, __pthread_keys); | |
if (err != TD_OK) | |
return err; | |
if (ps_pdread (ta->ph, addr, keys, keys_nb) != PS_OK) | |
return TD_ERR; | |
/* Now get all descriptors, one after the other. */ | |
for (idx = 0; idx < DB_DESC_NELEM (ta->ta_var___pthread_keys); ++idx) | |
{ | |
psaddr_t seq, destr; | |
err = DB_GET_FIELD_LOCAL (seq, ta, keys, pthread_key_struct, seq, 0); | |
if (err != TD_OK) | |
return err; | |
if (((uintptr_t) seq) & 1) | |
{ | |
err = DB_GET_FIELD_LOCAL (destr, ta, keys, pthread_key_struct, | |
destr, 0); | |
if (err != TD_OK) | |
return err; | |
/* Return with an error if the callback returns a nonzero value. */ | |
if (callback ((thread_key_t) idx, destr, cbdata_p) != 0) | |
return TD_DBERR; | |
} | |
/* Advance to the next element in the copied array. */ | |
keys += keys_elemsize; | |
} | |
return TD_OK; | |
} |