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/* Get thread information.
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Copyright (C) 1999-2018 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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<http://www.gnu.org/licenses/>. */
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#include <stddef.h>
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#include <string.h>
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#include <stdint.h>
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#include "thread_dbP.h"
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td_err_e
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td_thr_get_info (const td_thrhandle_t *th, td_thrinfo_t *infop)
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{
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td_err_e err;
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void *copy;
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psaddr_t tls, schedpolicy, schedprio, cancelhandling, tid, report_events;
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LOG ("td_thr_get_info");
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if (th->th_unique == 0)
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{
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/* Special case for the main thread before initialization. */
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copy = NULL;
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tls = 0;
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cancelhandling = 0;
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schedpolicy = SCHED_OTHER;
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schedprio = 0;
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tid = 0;
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err = DB_GET_VALUE (report_events, th->th_ta_p,
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__nptl_initial_report_events, 0);
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}
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else
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{
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/* Copy the whole descriptor in once so we can access the several
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fields locally. Excess copying in one go is much better than
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multiple ps_pdread calls. */
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err = DB_GET_STRUCT (copy, th->th_ta_p, th->th_unique, pthread);
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if (err != TD_OK)
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return err;
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err = DB_GET_FIELD_ADDRESS (tls, th->th_ta_p, th->th_unique,
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pthread, specific, 0);
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if (err != TD_OK)
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return err;
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err = DB_GET_FIELD_LOCAL (schedpolicy, th->th_ta_p, copy, pthread,
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schedpolicy, 0);
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if (err != TD_OK)
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return err;
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err = DB_GET_FIELD_LOCAL (schedprio, th->th_ta_p, copy, pthread,
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schedparam_sched_priority, 0);
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if (err != TD_OK)
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return err;
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err = DB_GET_FIELD_LOCAL (tid, th->th_ta_p, copy, pthread, tid, 0);
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if (err != TD_OK)
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return err;
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err = DB_GET_FIELD_LOCAL (cancelhandling, th->th_ta_p, copy, pthread,
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cancelhandling, 0);
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if (err != TD_OK)
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return err;
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err = DB_GET_FIELD_LOCAL (report_events, th->th_ta_p, copy, pthread,
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report_events, 0);
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}
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if (err != TD_OK)
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return err;
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/* Fill in information. Clear first to provide reproducable
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results for the fields we do not fill in. */
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memset (infop, '\0', sizeof (td_thrinfo_t));
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infop->ti_tid = (thread_t) th->th_unique;
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infop->ti_tls = (char *) tls;
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infop->ti_pri = ((uintptr_t) schedpolicy == SCHED_OTHER
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? 0 : (uintptr_t) schedprio);
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infop->ti_type = TD_THR_USER;
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if ((((int) (uintptr_t) cancelhandling) & EXITING_BITMASK) == 0)
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/* XXX For now there is no way to get more information. */
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infop->ti_state = TD_THR_ACTIVE;
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else if ((((int) (uintptr_t) cancelhandling) & TERMINATED_BITMASK) == 0)
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infop->ti_state = TD_THR_ZOMBIE;
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else
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infop->ti_state = TD_THR_UNKNOWN;
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/* Initialization which are the same in both cases. */
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infop->ti_ta_p = th->th_ta_p;
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infop->ti_lid = tid == 0 ? ps_getpid (th->th_ta_p->ph) : (uintptr_t) tid;
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infop->ti_traceme = report_events != 0;
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if (copy != NULL)
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err = DB_GET_FIELD_LOCAL (infop->ti_startfunc, th->th_ta_p, copy, pthread,
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start_routine, 0);
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if (copy != NULL && err == TD_OK)
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{
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uint32_t idx;
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for (idx = 0; idx < TD_EVENTSIZE; ++idx)
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{
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psaddr_t word;
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err = DB_GET_FIELD_LOCAL (word, th->th_ta_p, copy, pthread,
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eventbuf_eventmask_event_bits, idx);
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if (err != TD_OK)
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break;
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infop->ti_events.event_bits[idx] = (uintptr_t) word;
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}
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if (err == TD_NOAPLIC)
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memset (&infop->ti_events.event_bits[idx], 0,
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(TD_EVENTSIZE - idx) * sizeof infop->ti_events.event_bits[0]);
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}
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return err;
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}
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