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/* Attach to target process.
Copyright (C) 1999, 2001, 2002 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 1999.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <version.h>
#include "thread_dbP.h"
/* Datatype for the list of known thread agents. Normally there will
be exactly one so we don't spend much though on making it fast. */
LIST_HEAD (__td_agent_list);
td_err_e
td_ta_new (struct ps_prochandle *ps, td_thragent_t **ta)
{
psaddr_t addr;
psaddr_t versaddr;
char versbuf[sizeof (VERSION)];
LOG ("td_ta_new");
/* Get the global event mask. This is one of the variables which
are new in the thread library to enable debugging. If it is
not available we cannot debug. */
if (td_lookup (ps, SYM_PTHREAD_THREADS_EVENTS, &addr) != PS_OK)
return TD_NOLIBTHREAD;
/* Check whether the versions match. */
if (td_lookup (ps, SYM_PTHREAD_VERSION, &versaddr) != PS_OK)
return TD_VERSION;
if (ps_pdread (ps, versaddr, versbuf, sizeof (versbuf)) != PS_OK)
return TD_ERR;
if (versbuf[sizeof (versbuf) - 1] != '\0' || strcmp (versbuf, VERSION) != 0)
/* Not the right version. */
return TD_VERSION;
/* Fill in the appropriate information. */
*ta = (td_thragent_t *) malloc (sizeof (td_thragent_t));
if (*ta == NULL)
return TD_MALLOC;
/* Store the proc handle which we will pass to the callback functions
back into the debugger. */
(*ta)->ph = ps;
/* Remember the address. */
(*ta)->pthread_threads_eventsp = (td_thr_events_t *) addr;
/* Get the pointer to the variable pointing to the thread descriptor
with the last event. */
if (td_lookup (ps, SYM_PTHREAD_LAST_EVENT, &(*ta)->pthread_last_event)
!= PS_OK)
{
free_return:
free (*ta);
return TD_ERR;
}
if (td_lookup (ps, SYM_PTHREAD_STACK_USER, &addr) != PS_OK)
goto free_return;
/* Cast to the right type. */
(*ta)->stack_user = (list_t *) addr;
if (td_lookup (ps, SYM_PTHREAD_STACK_USED, &addr) != PS_OK)
goto free_return;
/* Cast to the right type. */
(*ta)->stack_used = (list_t *) addr;
if (td_lookup (ps, SYM_PTHREAD_KEYS, &addr) != PS_OK)
goto free_return;
/* Cast to the right type. */
(*ta)->keys = (struct pthread_key_struct *) addr;
/* Similarly for the maximum number of thread local data keys. */
if (td_lookup (ps, SYM_PTHREAD_KEYS_MAX, &addr) != PS_OK
|| ps_pdread (ps, addr, &(*ta)->pthread_keys_max, sizeof (int)) != PS_OK)
goto free_return;
/* And for the size of the second level arrays for the keys. */
if (td_lookup (ps, SYM_PTHREAD_SIZEOF_DESCR, &addr) != PS_OK
|| ps_pdread (ps, addr, &(*ta)->sizeof_descr, sizeof (int)) != PS_OK)
goto free_return;
/* Now add the new agent descriptor to the list. */
list_add (&(*ta)->list, &__td_agent_list);
return TD_OK;
}
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