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/* Iterate over a process's thread-specific data.
Copyright (C) 1999-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
<https://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;
}
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