/* Validate a thread handle. Copyright (C) 1999, 2001, 2002, 2003, 2004 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, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #include "thread_dbP.h" #include <stdbool.h> static td_err_e check_thread_list (const td_thrhandle_t *th, psaddr_t head, bool *uninit) { td_err_e err; psaddr_t next, ofs; err = DB_GET_FIELD (next, th->th_ta_p, head, list_t, next, 0); if (err == TD_OK) { if (next == 0) { *uninit = true; return TD_NOTHR; } err = DB_GET_FIELD_ADDRESS (ofs, th->th_ta_p, 0, pthread, list, 0); } while (err == TD_OK) { if (next == head) return TD_NOTHR; if (next - (ofs - (psaddr_t) 0) == th->th_unique) return TD_OK; err = DB_GET_FIELD (next, th->th_ta_p, next, list_t, next, 0); } return err; } td_err_e td_thr_validate (const td_thrhandle_t *th) { td_err_e err; psaddr_t list = NULL; LOG ("td_thr_validate"); /* First check the list with threads using user allocated stacks. */ bool uninit = false; err = DB_GET_SYMBOL (list, th->th_ta_p, __stack_user); if (err == TD_OK) err = check_thread_list (th, list, &uninit); /* If our thread is not on this list search the list with stack using implementation allocated stacks. */ if (err == TD_NOTHR) { err = DB_GET_SYMBOL (list, th->th_ta_p, stack_used); if (err == TD_OK) err = check_thread_list (th, list, &uninit); if (err == TD_NOTHR && uninit) { /* __pthread_initialize_minimal has not run yet. But the main thread still has a valid ID. */ td_thrhandle_t main_th; err = td_ta_map_lwp2thr (th->th_ta_p, ps_getpid (th->th_ta_p->ph), &main_th); if (err == TD_OK && th->th_unique != main_th.th_unique) err = TD_NOTHR; } } return err; }