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-rw-r--r--hurd/report-wait.c146
1 files changed, 146 insertions, 0 deletions
diff --git a/hurd/report-wait.c b/hurd/report-wait.c
new file mode 100644
index 0000000..521c522
--- /dev/null
+++ b/hurd/report-wait.c
@@ -0,0 +1,146 @@
+/* Report on what a thread in our task is waiting for.
+Copyright (C) 1996 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+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., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+#include <hurd.h>
+#include <hurd/signal.h>
+#include <hurd/fd.h>
+#include <string.h>
+#include <assert.h>
+#include <hurd/msg_server.h>
+#include "thread_state.h"
+#include "intr-msg.h"
+
+static void
+describe_number (string_t description, const char *flavor, int i)
+{
+ char *p = __stpcpy (description, flavor);
+ p += i / 10 + 1;
+ *p = '\0';
+ do
+ {
+ *--p = '0' + i % 10;
+ i /= 10;
+ } while (i != 0);
+ assert (p[-1] == '#');
+}
+
+static void
+describe_port (string_t description, mach_port_t port)
+{
+ int i;
+
+ if (port == __mach_task_self ())
+ {
+ strcpy (description, "task-self");
+ return;
+ }
+
+ for (i = 0; i < _hurd_nports; ++i)
+ if (port == _hurd_ports[i].port)
+ {
+ describe_number (description, "init#", i);
+ return;
+ }
+
+ if (_hurd_init_dtable)
+ {
+ for (i = 0; i < _hurd_init_dtablesize; ++i)
+ if (port == _hurd_init_dtable[i])
+ {
+ describe_number (description, "fd#", i);
+ return;
+ }
+ }
+ else if (_hurd_dtable)
+ {
+ for (i = 0; i < _hurd_dtablesize; ++i)
+ if (_hurd_dtable[i] == NULL)
+ continue;
+ else if (port == _hurd_dtable[i]->port.port)
+ {
+ describe_number (description, "fd#", i);
+ return;
+ }
+ else if (port == _hurd_dtable[i]->ctty.port)
+ {
+ describe_number (description, "bgfd#", i);
+ return;
+ }
+ }
+
+ describe_number (description, "port#", port);
+}
+
+
+kern_return_t
+_S_msg_report_wait (mach_port_t msgport, thread_t thread,
+ string_t description, int *msgid)
+{
+ *msgid = 0;
+
+ if (thread == _hurd_msgport_thread)
+ /* Cute. */
+ strcpy (description, "msgport");
+ else
+ {
+ /* Make sure this is really one of our threads. */
+
+ struct hurd_sigstate *ss;
+
+ __mutex_lock (&_hurd_siglock);
+ for (ss = _hurd_sigstates; ss != NULL; ss = ss->next)
+ if (ss->thread == thread)
+ break;
+ __mutex_unlock (&_hurd_siglock);
+ if (ss == NULL)
+ /* To hell with you. */
+ return EINVAL;
+
+ if (ss->suspended != MACH_PORT_NULL)
+ strcpy (description, "sigsuspend");
+ else
+ {
+ /* Examine the thread's state to see if it is blocked in an RPC. */
+
+ struct machine_thread_state state;
+ mach_msg_type_number_t count = MACHINE_THREAD_STATE_COUNT;
+ error_t err;
+
+ err = __thread_get_state (thread, MACHINE_THREAD_STATE_FLAVOR,
+ (integer_t *) &state, &count);
+ if (err)
+ return err;
+ assert (count == MACHINE_THREAD_STATE_COUNT);
+ if (SYSCALL_EXAMINE (&state, msgid))
+ {
+ /* Blocked in a system call. */
+ if (*msgid == -25)
+ /* mach_msg system call. Examine its parameters. */
+ describe_port (description, MSG_EXAMINE (&state, msgid));
+ else
+ strcpy (description, "kernel");
+ }
+ else
+ description[0] = '\0';
+ }
+ }
+
+ __mach_port_deallocate (__mach_task_self (), thread);
+ return 0;
+}