Permalink
Cannot retrieve contributors at this time
Name already in use
A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?
glibc/linuxthreads_db/td_ta_event_getmsg.c
Go to fileThis commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
128 lines (103 sloc)
3.87 KB
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
/* Retrieve event. | |
Copyright (C) 1999, 2001 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; | |
} |