/* 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_e td_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; }