| /* 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; |
| |
| /* 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; |
| } |