/* 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@cygnus.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 "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.  */struct agent_list *__td_agent_list;td_err_etd_ta_new (struct ps_prochandle *ps, td_thragent_t **ta){  psaddr_t addr;  psaddr_t versaddr;  char versbuf[sizeof (VERSION)];  struct agent_list *elemp;  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, PTHREAD_THREADS_EVENTS, &addr) != PS_OK)    return TD_NOLIBTHREAD;  /* Check whether the versions match.  */  if (td_lookup (ps, LINUXTHREADS_VERSION, &versaddr) != PS_OK)    return TD_VERSION;  if (ps_pdread (ps, versaddr, versbuf, sizeof (versbuf)) != PS_OK)    return TD_ERR;  versbuf[sizeof (versbuf) - 1] = '\0';  if (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, PTHREAD_LAST_EVENT, &(*ta)->pthread_last_event) != PS_OK)    {    free_return:      free (*ta);      return TD_ERR;    }  /* Get the pointer to the variable containing the number of active     threads.  */  if (td_lookup (ps, PTHREAD_HANDLES_NUM, &(*ta)->pthread_handles_num)      != PS_OK)    goto free_return;  /* See whether the library contains the necessary symbols.  */  if (td_lookup (ps, PTHREAD_HANDLES, &addr) != PS_OK)    goto free_return;  (*ta)->handles = (struct pthread_handle_struct *) addr;  if (td_lookup (ps, PTHREAD_KEYS, &addr) != PS_OK)    goto free_return;  /* Cast to the right type.  */  (*ta)->keys = (struct pthread_key_struct *) addr;  /* Find out about the maximum number of threads.  Old implementations     don't provide this information.  In this case we assume that the     debug  library is compiled with the same values.  */  if (td_lookup (ps, LINUXTHREADS_PTHREAD_THREADS_MAX, &addr) != PS_OK)    (*ta)->pthread_threads_max = PTHREAD_THREADS_MAX;  else    {      if (ps_pdread (ps, addr, &(*ta)->pthread_threads_max, sizeof (int))	  != PS_OK)	goto free_return;    }  /* Similar for the maximum number of thread local data keys.  */  if (td_lookup (ps, LINUXTHREADS_PTHREAD_KEYS_MAX, &addr) != PS_OK)    (*ta)->pthread_keys_max = PTHREAD_KEYS_MAX;  else    {      if (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, LINUXTHREADS_PTHREAD_SIZEOF_DESCR, &addr) != PS_OK)    (*ta)->sizeof_descr = sizeof (struct _pthread_descr_struct);  else    {      if (ps_pdread (ps, addr, &(*ta)->sizeof_descr, sizeof (int)) != PS_OK)	goto free_return;      /* Don't let bogons in the inferior make us mess ourselves.  */      if ((*ta)->sizeof_descr > sizeof (struct _pthread_descr_struct))	  (*ta)->sizeof_descr = sizeof (struct _pthread_descr_struct);    }  /* Now add the new agent descriptor to the list.  */  elemp = (struct agent_list *) malloc (sizeof (struct agent_list));  if (elemp == NULL)    {      /* Argh, now that everything else worked...  */      free (*ta);      return TD_MALLOC;    }  /* We don't care for thread-safety here.  */  elemp->ta = *ta;  elemp->next = __td_agent_list;  __td_agent_list = elemp;  return TD_OK;}