From a319d590551ff74bbc4de51243e2d5f20ac4c7fd Mon Sep 17 00:00:00 2001 From: Austin Foxley Date: Sat, 17 Oct 2009 12:32:38 -0700 Subject: libpthread/nptl_db: debugging support for nptl Signed-off-by: Austin Foxley --- libpthread/nptl_db/td_thr_validate.c | 91 ++++++++++++++++++++++++++++++++++++ 1 file changed, 91 insertions(+) create mode 100644 libpthread/nptl_db/td_thr_validate.c (limited to 'libpthread/nptl_db/td_thr_validate.c') diff --git a/libpthread/nptl_db/td_thr_validate.c b/libpthread/nptl_db/td_thr_validate.c new file mode 100644 index 000000000..19ee940d6 --- /dev/null +++ b/libpthread/nptl_db/td_thr_validate.c @@ -0,0 +1,91 @@ +/* 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 , 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 + +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; +} -- cgit v1.2.3