1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
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;
}
|
