1 /* Iterate over a process's threads.
2 Copyright (C) 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
21 #include "thread_dbP.h"
22 #include <linuxthreads/internals.h>
26 handle_descr (const td_thragent_t
*ta
, td_thr_iter_f
*callback
,
27 void *cbdata_p
, td_thr_state_e state
, int ti_pri
,
28 size_t cnt
, pthread_descr descr
)
30 struct _pthread_descr_struct pds
;
31 size_t sizeof_descr
= ta
->sizeof_descr
;
36 /* No descriptor (yet). */
39 /* This is the main thread. Create a fake descriptor. */
40 memset (&pds
, '\0', sizeof (pds
));
42 /* Empty thread descriptor the thread library would create. */
43 pds
.p_header
.data
.self
= &pds
;
44 pds
.p_nextlive
= pds
.p_prevlive
= &pds
;
45 pds
.p_tid
= PTHREAD_THREADS_MAX
;
46 /* The init code also sets up p_lock, p_errnop, p_herrnop, and
47 p_userstack but this should not be necessary here. */
49 th
.th_ta_p
= (td_thragent_t
*) ta
;
51 if (callback (&th
, cbdata_p
) != 0)
54 /* All done successfully. */
58 /* The manager is not yet started. No big deal. */
61 /* For every other thread this should not happen. */
65 if (ps_pdread (ta
->ph
, descr
, &pds
, sizeof_descr
) != PS_OK
)
66 return TD_ERR
; /* XXX Other error value? */
68 /* The manager thread must be handled special. The descriptor
69 exists but the thread only gets created when the first
70 `pthread_create' call is issued. A clear indication that this
71 happened is when the p_pid field is non-zero. */
72 if (cnt
== 1 && pds
.p_pid
== 0)
75 /* Now test whether this thread matches the specified
78 /* Only if the priority level is as high or higher. */
79 if (pds
.p_priority
< ti_pri
)
83 XXX This is incomplete. */
84 if (state
!= TD_THR_ANY_STATE
)
87 /* XXX For now we ignore threads which are not running anymore.
88 The reason is that gdb tries to get the registers and fails.
89 In future we should have a special mode of the thread library
90 in which we keep the process around until the actual join
91 operation happened. */
92 if (pds
.p_exited
!= 0)
95 /* Yep, it matches. Call the callback function. */
96 th
.th_ta_p
= (td_thragent_t
*) ta
;
98 if (callback (&th
, cbdata_p
) != 0)
101 /* All done successfully. */
107 td_ta_thr_iter (const td_thragent_t
*ta
, td_thr_iter_f
*callback
,
108 void *cbdata_p
, td_thr_state_e state
, int ti_pri
,
109 sigset_t
*ti_sigmask_p
, unsigned int ti_user_flags
)
111 int pthread_threads_max
;
112 struct pthread_handle_struct
*phc
;
113 td_err_e result
= TD_OK
;
115 #ifdef ALL_THREADS_STOPPED
121 LOG ("td_ta_thr_iter");
123 /* Test whether the TA parameter is ok. */
127 pthread_threads_max
= ta
->pthread_threads_max
;
128 phc
= (struct pthread_handle_struct
*) alloca (sizeof (phc
[0])
129 * pthread_threads_max
);
131 /* First read only the main thread and manager thread information. */
132 if (ps_pdread (ta
->ph
, ta
->handles
, phc
,
133 sizeof (struct pthread_handle_struct
) * 2) != PS_OK
)
134 return TD_ERR
; /* XXX Other error value? */
136 /* Now handle these descriptors. */
137 result
= handle_descr (ta
, callback
, cbdata_p
, state
, ti_pri
, 0,
141 result
= handle_descr (ta
, callback
, cbdata_p
, state
, ti_pri
, 1,
146 /* Read all the descriptors. */
147 if (ps_pdread (ta
->ph
, ta
->handles
+ 2, &phc
[2],
148 (sizeof (struct pthread_handle_struct
)
149 * (pthread_threads_max
- 2))) != PS_OK
)
150 return TD_ERR
; /* XXX Other error value? */
152 #ifdef ALL_THREADS_STOPPED
153 /* Read the number of currently active threads. */
154 if (ps_pdread (ta
->ph
, ta
->pthread_handles_num
, &num
, sizeof (int)) != PS_OK
)
155 return TD_ERR
; /* XXX Other error value? */
158 /* Now get all descriptors, one after the other. */
159 for (cnt
= 2; cnt
< pthread_threads_max
&& num
> 0; ++cnt
)
160 if (phc
[cnt
].h_descr
!= NULL
)
162 #ifdef ALL_THREADS_STOPPED
163 /* First count this active thread. */
167 result
= handle_descr (ta
, callback
, cbdata_p
, state
, ti_pri
, cnt
,