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
|
/* Iterate over a process's threads.
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 "thread_dbP.h"
static int
handle_descr (const td_thragent_t *ta, td_thr_iter_f *callback,
void *cbdata_p, td_thr_state_e state, int ti_pri,
size_t cnt, pthread_descr descr)
{
struct _pthread_descr_struct pds;
size_t sizeof_descr = ta->sizeof_descr;
td_thrhandle_t th;
if (ps_pdread (ta->ph, descr, &pds, sizeof_descr) != PS_OK)
return TD_ERR; /* XXX Other error value? */
/* The manager thread must be handled special. The descriptor
exists but the thread only gets created when the first
`pthread_create' call is issued. A clear indication that this
happened is when the p_pid field is non-zero. */
if (cnt == 1 && pds.p_pid == 0)
return TD_OK;
/* Now test whether this thread matches the specified
conditions. */
/* Only if the priority level is as high or higher. */
if (pds.p_priority < ti_pri)
return TD_OK;
/* Test the state.
XXX This is incomplete. */
if (state != TD_THR_ANY_STATE)
return TD_OK;
/* XXX For now we ignore threads which are not running anymore.
The reason is that gdb tries to get the registers and fails.
In future we should have a special mode of the thread library
in which we keep the process around until the actual join
operation happened. */
if (pds.p_exited != 0)
return TD_OK;
/* Yep, it matches. Call the callback function. */
th.th_ta_p = (td_thragent_t *) ta;
th.th_unique = descr;
if (callback (&th, cbdata_p) != 0)
return TD_DBERR;
/* All done successfully. */
return TD_OK;
}
td_err_e
td_ta_thr_iter (const td_thragent_t *ta, td_thr_iter_f *callback,
void *cbdata_p, td_thr_state_e state, int ti_pri,
sigset_t *ti_sigmask_p, unsigned int ti_user_flags)
{
int pthread_threads_max;
struct pthread_handle_struct *phc;
td_err_e result = TD_OK;
int cnt;
#ifdef ALL_THREADS_STOPPED
int num;
#else
# define num 1
#endif
LOG (__FUNCTION__);
/* Test whether the TA parameter is ok. */
if (! ta_ok (ta))
return TD_BADTA;
pthread_threads_max = ta->pthread_threads_max;
phc = (struct pthread_handle_struct *) alloca (sizeof (phc[0])
* pthread_threads_max);
/* First read only the main thread and manager thread information. */
if (ps_pdread (ta->ph, ta->handles, phc,
sizeof (struct pthread_handle_struct) * 2) != PS_OK)
return TD_ERR; /* XXX Other error value? */
/* Now handle these descriptors. */
result = handle_descr (ta, callback, cbdata_p, state, ti_pri, 0,
phc[0].h_descr);
if (result != TD_OK)
return result;
result = handle_descr (ta, callback, cbdata_p, state, ti_pri, 1,
phc[1].h_descr);
if (result != TD_OK)
return result;
/* Read all the descriptors. */
if (ps_pdread (ta->ph, ta->handles + 2, &phc[2],
(sizeof (struct pthread_handle_struct)
* (pthread_threads_max - 2))) != PS_OK)
return TD_ERR; /* XXX Other error value? */
#ifdef ALL_THREADS_STOPPED
/* 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? */
#endif
/* Now get all descriptors, one after the other. */
for (cnt = 2; cnt < pthread_threads_max && num > 0; ++cnt)
if (phc[cnt].h_descr != NULL)
{
#ifdef ALL_THREADS_STOPPED
/* First count this active thread. */
--num;
#endif
result = handle_descr (ta, callback, cbdata_p, state, ti_pri, cnt,
phc[cnt].h_descr);
if (result != TD_OK)
break;
}
return result;
}
|
