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jeremybenn |
/* Which thread is running on an lwp?
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Copyright (C) 1999 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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td_err_e
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td_ta_map_lwp2thr (const td_thragent_t *ta, lwpid_t lwpid, td_thrhandle_t *th)
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{
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int pthread_threads_max = ta->pthread_threads_max;
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size_t sizeof_descr = ta->sizeof_descr;
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struct pthread_handle_struct phc[pthread_threads_max];
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size_t 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 ("td_ta_map_lwp2thr");
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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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/* Read all the descriptors. */
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if (ps_pdread (ta->ph, ta->handles, phc,
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sizeof (struct pthread_handle_struct) * pthread_threads_max)
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!= 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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/* Get the entries one after the other and find out whether the ID
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matches. */
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for (cnt = 0; 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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struct _pthread_descr_struct pds;
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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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if (ps_pdread (ta->ph, phc[cnt].h_descr, &pds, sizeof_descr) != PS_OK)
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return TD_ERR; /* XXX Other error value? */
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if ((pds.p_pid ?: ps_getpid (ta->ph)) == lwpid)
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{
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/* Found it. Now fill in the `td_thrhandle_t' object. */
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th->th_ta_p = (td_thragent_t *) ta;
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th->th_unique = phc[cnt].h_descr;
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return TD_OK;
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}
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}
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return TD_NOLWP;
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}
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