| /* Retrieve event. |
| 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 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, td_event_msg_t *msg) |
| { |
| /* XXX I cannot think of another way but using a static variable. */ |
| static td_thrhandle_t th; |
| td_eventbuf_t event; |
| psaddr_t addr; |
| |
| LOG ("td_ta_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. */ |
| if (ps_pdread (ta->ph, ta->pthread_last_event, |
| &addr, sizeof (void *)) != PS_OK) |
| return TD_ERR; /* XXX Other error value? */ |
| |
| /* If the pointer is NULL no event occurred. */ |
| if (addr == 0) |
| return TD_NOMSG; |
| |
| /* Read the even structure from the target. */ |
| if (ps_pdread (ta->ph, |
| ((char *) addr |
| + offsetof (struct _pthread_descr_struct, p_eventbuf)), |
| &event, sizeof (td_eventbuf_t)) != PS_OK) |
| return TD_ERR; /* XXX Other error value? */ |
| |
| /* Check whether an event occurred. */ |
| if (event.eventnum == TD_EVENT_NONE) |
| { |
| /* Oh well, this means the last event was already read. So |
| we have to look for any other event. */ |
| struct pthread_handle_struct handles[ta->pthread_threads_max]; |
| int num; |
| int i; |
| |
| /* Read the number of currently active threads. */ |
| if (ps_pdread (ta->ph, ta->pthread_handles_num, &num, sizeof (int)) |
| != PS_OK) |
| return TD_ERR; /* XXX Other error value? */ |
| |
| /* Now read the handles. */ |
| if (ps_pdread (ta->ph, ta->handles, handles, |
| ta->pthread_threads_max * sizeof (handles[0])) != PS_OK) |
| return TD_ERR; /* XXX Other error value? */ |
| |
| for (i = 0; i < ta->pthread_threads_max && num > 0; ++i) |
| { |
| if (handles[i].h_descr == NULL) |
| /* No entry here. */ |
| continue; |
| |
| /* First count this active thread. */ |
| --num; |
| |
| if (handles[i].h_descr == addr) |
| /* We already handled this. */ |
| continue; |
| |
| /* Read the event data for this thread. */ |
| if (ps_pdread (ta->ph, |
| ((char *) handles[i].h_descr |
| + offsetof (struct _pthread_descr_struct, |
| p_eventbuf)), |
| &event, sizeof (td_eventbuf_t)) != PS_OK) |
| return TD_ERR; |
| |
| if (event.eventnum != TD_EVENT_NONE) |
| { |
| /* We found a thread with an unreported event. */ |
| addr = handles[i].h_descr; |
| break; |
| } |
| } |
| |
| /* If we haven't found any other event signal this to the user. */ |
| if (event.eventnum == TD_EVENT_NONE) |
| return TD_NOMSG; |
| } |
| |
| /* Generate the thread descriptor. */ |
| th.th_ta_p = (td_thragent_t *) ta; |
| th.th_unique = addr; |
| |
| /* Fill the user's data structure. */ |
| msg->event = event.eventnum; |
| msg->th_p = &th; |
| msg->msg.data = (uintptr_t) event.eventdata; |
| |
| /* And clear the event message in the target. */ |
| memset (&event, '\0', sizeof (td_eventbuf_t)); |
| if (ps_pdwrite (ta->ph, |
| ((char *) addr |
| + offsetof (struct _pthread_descr_struct, p_eventbuf)), |
| &event, sizeof (td_eventbuf_t)) != PS_OK) |
| return TD_ERR; /* XXX Other error value? */ |
| |
| return TD_OK; |
| } |