diff options
Diffstat (limited to 'libpthread/linuxthreads_db/td_ta_new.c')
| -rw-r--r-- | libpthread/linuxthreads_db/td_ta_new.c | 154 |
1 files changed, 154 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..32b9b04c9 --- /dev/null +++ b/libpthread/linuxthreads_db/td_ta_new.c @@ -0,0 +1,154 @@ +/* Attach to target process. + Copyright (C) 1999 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. 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 <gnu/lib-names.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; + struct agent_list *elemp; + + LOG (__FUNCTION__); + + /* 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 (ps_pglobal_lookup (ps, LIBPTHREAD_SO, + "__pthread_threads_events", &addr) != PS_OK) + return TD_NOLIBTHREAD; + + /* 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 (ps_pglobal_lookup (ps, LIBPTHREAD_SO, + "__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 (ps_pglobal_lookup (ps, LIBPTHREAD_SO, + "__pthread_handles_num", + &(*ta)->pthread_handles_num) != PS_OK) + goto free_return; + + /* See whether the library contains the necessary symbols. */ + if (ps_pglobal_lookup (ps, LIBPTHREAD_SO, "__pthread_handles", + &addr) != PS_OK) + goto free_return; + + (*ta)->handles = (struct pthread_handle_struct *) addr; + + + if (ps_pglobal_lookup (ps, LIBPTHREAD_SO, "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 (ps_pglobal_lookup (ps, LIBPTHREAD_SO, + "__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 (ps_pglobal_lookup (ps, LIBPTHREAD_SO, + "__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 (ps_pglobal_lookup (ps, LIBPTHREAD_SO, + "__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; + } + + /* Similar for the maximum number of thread local data keys. */ + if (ps_pglobal_lookup (ps, LIBPTHREAD_SO, + "__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; + } + + /* 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; +} |