mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-13 00:30:07 +00:00
147 lines
3.6 KiB
C
147 lines
3.6 KiB
C
/* 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;
|
|
}
|