diff options
Diffstat (limited to 'libpthread/linuxthreads_db/td_ta_new.c')
| -rw-r--r-- | libpthread/linuxthreads_db/td_ta_new.c | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/libpthread/linuxthreads_db/td_ta_new.c b/libpthread/linuxthreads_db/td_ta_new.c new file mode 100644 index 000000000..2b0b68bf0 --- /dev/null +++ b/libpthread/linuxthreads_db/td_ta_new.c @@ -0,0 +1,149 @@ +/* Attach to target process. + Copyright (C) 1999, 2001, 2002, 2003 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; +} |