133 lines
4.1 KiB
C
133 lines
4.1 KiB
C
/* Attach to target process.
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Copyright (C) 1999, 2001 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 <stddef.h>
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#include <stdlib.h>
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#include "thread_dbP.h"
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/* Datatype for the list of known thread agents. Normally there will
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be exactly one so we don't spend much though on making it fast. */
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struct agent_list *__td_agent_list;
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td_err_e
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td_ta_new (struct ps_prochandle *ps, td_thragent_t **ta)
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{
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psaddr_t addr;
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struct agent_list *elemp;
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LOG ("td_ta_new");
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/* Get the global event mask. This is one of the variables which
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are new in the thread library to enable debugging. If it is
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not available we cannot debug. */
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if (td_lookup (ps, PTHREAD_THREADS_EVENTS, &addr) != PS_OK)
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return TD_NOLIBTHREAD;
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/* Fill in the appropriate information. */
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*ta = (td_thragent_t *) malloc (sizeof (td_thragent_t));
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if (*ta == NULL)
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return TD_MALLOC;
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/* Store the proc handle which we will pass to the callback functions
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back into the debugger. */
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(*ta)->ph = ps;
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/* Remember the address. */
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(*ta)->pthread_threads_eventsp = (td_thr_events_t *) addr;
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/* Get the pointer to the variable pointing to the thread descriptor
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with the last event. */
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if (td_lookup (ps, PTHREAD_LAST_EVENT, &(*ta)->pthread_last_event) != PS_OK)
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{
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free_return:
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free (*ta);
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return TD_ERR;
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}
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/* Get the pointer to the variable containing the number of active
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threads. */
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if (td_lookup (ps, PTHREAD_HANDLES_NUM, &(*ta)->pthread_handles_num)
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!= PS_OK)
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goto free_return;
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/* See whether the library contains the necessary symbols. */
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if (td_lookup (ps, PTHREAD_HANDLES, &addr) != PS_OK)
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goto free_return;
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(*ta)->handles = (struct pthread_handle_struct *) addr;
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if (td_lookup (ps, PTHREAD_KEYS, &addr) != PS_OK)
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goto free_return;
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/* Cast to the right type. */
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(*ta)->keys = (struct pthread_key_struct *) addr;
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/* Find out about the maximum number of threads. Old implementations
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don't provide this information. In this case we assume that the
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debug library is compiled with the same values. */
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if (td_lookup (ps, LINUXTHREADS_PTHREAD_THREADS_MAX, &addr) != PS_OK)
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(*ta)->pthread_threads_max = PTHREAD_THREADS_MAX;
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else
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{
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if (ps_pdread (ps, addr, &(*ta)->pthread_threads_max, sizeof (int))
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!= PS_OK)
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goto free_return;
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}
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/* Similar for the maximum number of thread local data keys. */
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if (td_lookup (ps, LINUXTHREADS_PTHREAD_KEYS_MAX, &addr) != PS_OK)
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(*ta)->pthread_keys_max = PTHREAD_KEYS_MAX;
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else
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{
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if (ps_pdread (ps, addr, &(*ta)->pthread_keys_max, sizeof (int))
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!= PS_OK)
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goto free_return;
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}
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/* And for the size of the second level arrays for the keys. */
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if (td_lookup (ps, LINUXTHREADS_PTHREAD_SIZEOF_DESCR, &addr) != PS_OK)
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(*ta)->sizeof_descr = sizeof (struct _pthread_descr_struct);
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else
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{
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if (ps_pdread (ps, addr, &(*ta)->sizeof_descr, sizeof (int)) != PS_OK)
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goto free_return;
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}
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/* Now add the new agent descriptor to the list. */
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elemp = (struct agent_list *) malloc (sizeof (struct agent_list));
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if (elemp == NULL)
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{
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/* Argh, now that everything else worked... */
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free (*ta);
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return TD_MALLOC;
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}
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/* We don't care for thread-safety here. */
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elemp->ta = *ta;
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elemp->next = __td_agent_list;
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__td_agent_list = elemp;
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return TD_OK;
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}
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