143 lines
4.4 KiB
C
143 lines
4.4 KiB
C
/* Iterate over a process's threads.
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Copyright (C) 1999, 2000 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@cygnus.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, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include "thread_dbP.h"
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#include <alloca.h>
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static int
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handle_descr (const td_thragent_t *ta, td_thr_iter_f *callback,
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void *cbdata_p, td_thr_state_e state, int ti_pri,
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size_t cnt, pthread_descr descr)
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{
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struct _pthread_descr_struct pds;
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size_t sizeof_descr = ta->sizeof_descr;
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td_thrhandle_t th;
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if (ps_pdread (ta->ph, descr, &pds, sizeof_descr) != PS_OK)
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return TD_ERR; /* XXX Other error value? */
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/* The manager thread must be handled special. The descriptor
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exists but the thread only gets created when the first
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`pthread_create' call is issued. A clear indication that this
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happened is when the p_pid field is non-zero. */
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if (cnt == 1 && pds.p_pid == 0)
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return TD_OK;
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/* Now test whether this thread matches the specified
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conditions. */
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/* Only if the priority level is as high or higher. */
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if (pds.p_priority < ti_pri)
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return TD_OK;
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/* Test the state.
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XXX This is incomplete. */
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if (state != TD_THR_ANY_STATE)
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return TD_OK;
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/* XXX For now we ignore threads which are not running anymore.
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The reason is that gdb tries to get the registers and fails.
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In future we should have a special mode of the thread library
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in which we keep the process around until the actual join
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operation happened. */
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if (pds.p_exited != 0)
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return TD_OK;
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/* Yep, it matches. Call the callback function. */
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th.th_ta_p = (td_thragent_t *) ta;
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th.th_unique = descr;
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if (callback (&th, cbdata_p) != 0)
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return TD_DBERR;
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/* All done successfully. */
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return TD_OK;
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}
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td_err_e
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td_ta_thr_iter (const td_thragent_t *ta, td_thr_iter_f *callback,
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void *cbdata_p, td_thr_state_e state, int ti_pri,
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sigset_t *ti_sigmask_p, unsigned int ti_user_flags)
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{
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int pthread_threads_max;
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struct pthread_handle_struct *phc;
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td_err_e result = TD_OK;
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int cnt;
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#ifdef ALL_THREADS_STOPPED
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int num;
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#else
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# define num 1
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#endif
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LOG (__FUNCTION__);
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/* Test whether the TA parameter is ok. */
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if (! ta_ok (ta))
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return TD_BADTA;
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pthread_threads_max = ta->pthread_threads_max;
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phc = (struct pthread_handle_struct *) alloca (sizeof (phc[0])
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* pthread_threads_max);
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/* First read only the main thread and manager thread information. */
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if (ps_pdread (ta->ph, ta->handles, phc,
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sizeof (struct pthread_handle_struct) * 2) != PS_OK)
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return TD_ERR; /* XXX Other error value? */
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/* Now handle these descriptors. */
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result = handle_descr (ta, callback, cbdata_p, state, ti_pri, 0,
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phc[0].h_descr);
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if (result != TD_OK)
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return result;
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result = handle_descr (ta, callback, cbdata_p, state, ti_pri, 1,
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phc[1].h_descr);
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if (result != TD_OK)
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return result;
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/* Read all the descriptors. */
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if (ps_pdread (ta->ph, ta->handles + 2, &phc[2],
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(sizeof (struct pthread_handle_struct)
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* (pthread_threads_max - 2))) != PS_OK)
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return TD_ERR; /* XXX Other error value? */
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#ifdef ALL_THREADS_STOPPED
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/* Read the number of currently active threads. */
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if (ps_pdread (ta->ph, ta->pthread_handles_num, &num, sizeof (int)) != PS_OK)
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return TD_ERR; /* XXX Other error value? */
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#endif
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/* Now get all descriptors, one after the other. */
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for (cnt = 2; cnt < pthread_threads_max && num > 0; ++cnt)
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if (phc[cnt].h_descr != NULL)
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{
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#ifdef ALL_THREADS_STOPPED
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/* First count this active thread. */
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--num;
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#endif
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result = handle_descr (ta, callback, cbdata_p, state, ti_pri, cnt,
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phc[cnt].h_descr);
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if (result != TD_OK)
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break;
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}
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return result;
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}
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