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85 lines
2.3 KiB
C
85 lines
2.3 KiB
C
/* Validate a thread handle.
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Copyright (C) 1999-2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 1999.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include "thread_dbP.h"
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#include <stdbool.h>
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static td_err_e
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check_thread_list (const td_thrhandle_t *th, psaddr_t head, bool *uninit)
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{
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td_err_e err;
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psaddr_t next, ofs;
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err = DB_GET_FIELD (next, th->th_ta_p, head, list_t, next, 0);
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if (err == TD_OK)
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{
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if (next == 0)
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{
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*uninit = true;
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return TD_NOTHR;
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}
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err = DB_GET_FIELD_ADDRESS (ofs, th->th_ta_p, 0, pthread, list, 0);
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}
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while (err == TD_OK)
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{
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if (next == head)
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return TD_NOTHR;
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if (next - (ofs - (psaddr_t) 0) == th->th_unique)
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return TD_OK;
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err = DB_GET_FIELD (next, th->th_ta_p, next, list_t, next, 0);
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}
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return err;
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}
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td_err_e
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td_thr_validate (const td_thrhandle_t *th)
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{
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td_err_e err;
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psaddr_t list;
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LOG ("td_thr_validate");
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/* First check the list with threads using user allocated stacks. */
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bool uninit = false;
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err = DB_GET_SYMBOL (list, th->th_ta_p, __stack_user);
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if (err == TD_OK)
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err = check_thread_list (th, list, &uninit);
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/* If our thread is not on this list search the list with stack
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using implementation allocated stacks. */
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if (err == TD_NOTHR)
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{
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err = DB_GET_SYMBOL (list, th->th_ta_p, stack_used);
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if (err == TD_OK)
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err = check_thread_list (th, list, &uninit);
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if (err == TD_NOTHR && uninit && th->th_unique == 0)
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/* __pthread_initialize_minimal has not run yet.
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There is only the special case thread handle. */
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err = TD_OK;
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}
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return err;
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}
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