summaryrefslogtreecommitdiff
path: root/libpthread/linuxthreads_db/td_ta_new.c
diff options
context:
space:
mode:
Diffstat (limited to 'libpthread/linuxthreads_db/td_ta_new.c')
-rw-r--r--libpthread/linuxthreads_db/td_ta_new.c149
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;
+}