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Diffstat (limited to 'libpthread/nptl_db/td_ta_event_getmsg.c')
-rw-r--r--libpthread/nptl_db/td_ta_event_getmsg.c105
1 files changed, 105 insertions, 0 deletions
diff --git a/libpthread/nptl_db/td_ta_event_getmsg.c b/libpthread/nptl_db/td_ta_event_getmsg.c
new file mode 100644
index 000000000..d3b46bd56
--- /dev/null
+++ b/libpthread/nptl_db/td_ta_event_getmsg.c
@@ -0,0 +1,105 @@
+/* Retrieve event.
+ Copyright (C) 1999, 2001, 2002, 2003 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@redhat.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 <string.h>
+
+#include "thread_dbP.h"
+
+
+td_err_e
+td_ta_event_getmsg (const td_thragent_t *ta_arg, td_event_msg_t *msg)
+{
+ td_thragent_t *const ta = (td_thragent_t *) ta_arg;
+ td_err_e err;
+ psaddr_t eventbuf, eventnum, eventdata;
+ psaddr_t thp, next;
+ void *copy = NULL;
+
+ /* XXX I cannot think of another way but using a static variable. */
+ /* XXX Use at least __thread once it is possible. */
+ static td_thrhandle_t th;
+
+ LOG ("td_thr_event_getmsg");
+
+ /* Test whether the TA parameter is ok. */
+ if (! ta_ok (ta))
+ return TD_BADTA;
+
+ /* Get the pointer to the thread descriptor with the last event. */
+ err = DB_GET_VALUE (thp, ta, __nptl_last_event, 0);
+ if (err != TD_OK)
+ return err;
+
+ if (thp == 0)
+ /* Nothing waiting. */
+ return TD_NOMSG;
+
+ /* Copy the event message buffer in from the inferior. */
+ err = DB_GET_FIELD_ADDRESS (eventbuf, ta, thp, pthread, eventbuf, 0);
+ if (err == TD_OK)
+ err = DB_GET_STRUCT (copy, ta, eventbuf, td_eventbuf_t);
+ if (err != TD_OK)
+ return err;
+
+ /* Read the event details from the target thread. */
+ err = DB_GET_FIELD_LOCAL (eventnum, ta, copy, td_eventbuf_t, eventnum, 0);
+ if (err != TD_OK)
+ return err;
+ /* If the structure is on the list there better be an event recorded. */
+ if ((int) (uintptr_t) eventnum == TD_EVENT_NONE)
+ return TD_DBERR;
+
+ /* Fill the user's data structure. */
+ err = DB_GET_FIELD_LOCAL (eventdata, ta, copy, td_eventbuf_t, eventdata, 0);
+ if (err != TD_OK)
+ return err;
+
+ /* Generate the thread descriptor. */
+ th.th_ta_p = (td_thragent_t *) ta;
+ th.th_unique = thp;
+
+ /* Fill the user's data structure. */
+ msg->msg.data = (uintptr_t) eventdata;
+ msg->event = (uintptr_t) eventnum;
+ msg->th_p = &th;
+
+ /* And clear the event message in the target. */
+ memset (copy, 0, ta->ta_sizeof_td_eventbuf_t);
+ err = DB_PUT_STRUCT (ta, eventbuf, td_eventbuf_t, copy);
+ if (err != TD_OK)
+ return err;
+
+ /* Get the pointer to the next descriptor with an event. */
+ err = DB_GET_FIELD (next, ta, thp, pthread, nextevent, 0);
+ if (err != TD_OK)
+ return err;
+
+ /* Store the pointer in the list head variable. */
+ err = DB_PUT_VALUE (ta, __nptl_last_event, 0, next);
+ if (err != TD_OK)
+ return err;
+
+ if (next != 0)
+ /* Clear the next pointer in the current descriptor. */
+ err = DB_PUT_FIELD (ta, thp, pthread, nextevent, 0, 0);
+
+ return err;
+}