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authorUlrich Drepper <drepper@redhat.com>1999-11-03 06:13:09 +0000
committerUlrich Drepper <drepper@redhat.com>1999-11-03 06:13:09 +0000
commitab86fbb1d2866df567219904982dac61751808e5 (patch)
tree7ef290b73205d2a02ca808b585984d6c562857b0 /linuxthreads_db/td_ta_event_getmsg.c
parentdbd3e8629f6efb51bcddbd9e85ab87c0dd95a6ee (diff)
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Update.
* internals.h: Declare __pthread_last_event. * manager.c: Define __pthread_last_event. (pthread_handle_create): Set __pthread_last_event. (pthread_exited): Likewise. * join.c (pthread_exit): Likewise.
Diffstat (limited to 'linuxthreads_db/td_ta_event_getmsg.c')
-rw-r--r--linuxthreads_db/td_ta_event_getmsg.c124
1 files changed, 124 insertions, 0 deletions
diff --git a/linuxthreads_db/td_ta_event_getmsg.c b/linuxthreads_db/td_ta_event_getmsg.c
new file mode 100644
index 0000000000..6b56e0d5e7
--- /dev/null
+++ b/linuxthreads_db/td_ta_event_getmsg.c
@@ -0,0 +1,124 @@
+/* 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 Library General Public License as
+ published by the Free Software Foundation; either version 2 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
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. 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 (__FUNCTION__);
+
+ /* 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;
+}