116 lines
3.6 KiB
C
116 lines
3.6 KiB
C
/* Attach to target process.
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Copyright (C) 1999, 2001, 2002 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, 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 <string.h>
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#include <version.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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LIST_HEAD (__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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psaddr_t versaddr;
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char versbuf[sizeof (VERSION)];
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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, SYM_PTHREAD_THREADS_EVENTS, &addr) != PS_OK)
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return TD_NOLIBTHREAD;
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/* Check whether the versions match. */
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if (td_lookup (ps, SYM_PTHREAD_VERSION, &versaddr) != PS_OK)
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return TD_VERSION;
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if (ps_pdread (ps, versaddr, versbuf, sizeof (versbuf)) != PS_OK)
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return TD_ERR;
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if (versbuf[sizeof (versbuf) - 1] != '\0' || strcmp (versbuf, VERSION) != 0)
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/* Not the right version. */
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return TD_VERSION;
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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, SYM_PTHREAD_LAST_EVENT, &(*ta)->pthread_last_event)
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!= 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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if (td_lookup (ps, SYM_PTHREAD_STACK_USER, &addr) != PS_OK)
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goto free_return;
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/* Cast to the right type. */
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(*ta)->stack_user = (list_t *) addr;
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if (td_lookup (ps, SYM_PTHREAD_STACK_USED, &addr) != PS_OK)
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goto free_return;
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/* Cast to the right type. */
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(*ta)->stack_used = (list_t *) addr;
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if (td_lookup (ps, SYM_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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/* Similarly for the maximum number of thread local data keys. */
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if (td_lookup (ps, SYM_PTHREAD_KEYS_MAX, &addr) != PS_OK
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|| ps_pdread (ps, addr, &(*ta)->pthread_keys_max, sizeof (int)) != PS_OK)
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goto free_return;
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/* And for the size of the second level arrays for the keys. */
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if (td_lookup (ps, SYM_PTHREAD_SIZEOF_DESCR, &addr) != PS_OK
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|| ps_pdread (ps, addr, &(*ta)->sizeof_descr, sizeof (int)) != PS_OK)
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goto free_return;
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/* Now add the new agent descriptor to the list. */
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list_add (&(*ta)->list, &__td_agent_list);
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return TD_OK;
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}
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