1 /* Iterate over a process's threads.
2 Copyright (C) 1999,2000,2001,2002,2003 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, see
18 <http://www.gnu.org/licenses/>. */
20 #include "thread_dbP.h"
21 #include <linuxthreads/internals.h>
25 handle_descr (const td_thragent_t *ta, td_thr_iter_f *callback,
26 void *cbdata_p, td_thr_state_e state, int ti_pri,
27 size_t cnt, pthread_descr descr)
29 struct _pthread_descr_struct pds;
30 size_t sizeof_descr = ta->sizeof_descr;
35 /* No descriptor (yet). */
38 /* This is the main thread. Create a fake descriptor. */
39 memset (&pds, '\0', sizeof (pds));
41 /* Empty thread descriptor the thread library would create. */
42 #if !defined __UCLIBC_HAS_TLS__ || !TLS_DTV_AT_TP
43 pds.p_header.data.self = &pds;
45 pds.p_nextlive = pds.p_prevlive = &pds;
46 pds.p_tid = PTHREAD_THREADS_MAX;
47 /* The init code also sets up p_lock, p_errnop, p_herrnop, and
48 p_userstack but this should not be necessary here. */
50 th.th_ta_p = (td_thragent_t *) ta;
52 if (callback (&th, cbdata_p) != 0)
55 /* All done successfully. */
59 /* The manager is not yet started. No big deal. */
62 /* For every other thread this should not happen. */
66 if (ps_pdread (ta->ph, descr, &pds, sizeof_descr) != PS_OK)
67 return TD_ERR; /* XXX Other error value? */
69 /* The manager thread must be handled special. The descriptor
70 exists but the thread only gets created when the first
71 `pthread_create' call is issued. A clear indication that this
72 happened is when the p_pid field is non-zero. */
73 if (cnt == 1 && pds.p_pid == 0)
76 /* Now test whether this thread matches the specified
79 /* Only if the priority level is as high or higher. */
80 if (pds.p_priority < ti_pri)
84 XXX This is incomplete. */
85 if (state != TD_THR_ANY_STATE)
88 /* XXX For now we ignore threads which are not running anymore.
89 The reason is that gdb tries to get the registers and fails.
90 In future we should have a special mode of the thread library
91 in which we keep the process around until the actual join
92 operation happened. */
93 if (pds.p_exited != 0)
96 /* Yep, it matches. Call the callback function. */
97 th.th_ta_p = (td_thragent_t *) ta;
99 if (callback (&th, cbdata_p) != 0)
102 /* All done successfully. */
108 td_ta_thr_iter (const td_thragent_t *ta, td_thr_iter_f *callback,
109 void *cbdata_p, td_thr_state_e state, int ti_pri,
110 sigset_t *ti_sigmask_p, unsigned int ti_user_flags)
112 int pthread_threads_max;
113 struct pthread_handle_struct *phc;
114 td_err_e result = TD_OK;
116 #ifdef ALL_THREADS_STOPPED
122 LOG ("td_ta_thr_iter");
124 /* Test whether the TA parameter is ok. */
128 pthread_threads_max = ta->pthread_threads_max;
129 phc = (struct pthread_handle_struct *) alloca (sizeof (phc[0])
130 * pthread_threads_max);
132 /* First read only the main thread and manager thread information. */
133 if (ps_pdread (ta->ph, ta->handles, phc,
134 sizeof (struct pthread_handle_struct) * 2) != PS_OK)
135 return TD_ERR; /* XXX Other error value? */
137 /* Now handle these descriptors. */
138 result = handle_descr (ta, callback, cbdata_p, state, ti_pri, 0,
142 result = handle_descr (ta, callback, cbdata_p, state, ti_pri, 1,
147 /* Read all the descriptors. */
148 if (ps_pdread (ta->ph, ta->handles + 2, &phc[2],
149 (sizeof (struct pthread_handle_struct)
150 * (pthread_threads_max - 2))) != PS_OK)
151 return TD_ERR; /* XXX Other error value? */
153 #ifdef ALL_THREADS_STOPPED
154 /* Read the number of currently active threads. */
155 if (ps_pdread (ta->ph, ta->pthread_handles_num, &num, sizeof (int)) != PS_OK)
156 return TD_ERR; /* XXX Other error value? */
159 /* Now get all descriptors, one after the other. */
160 for (cnt = 2; cnt < pthread_threads_max && num > 0; ++cnt)
161 if (phc[cnt].h_descr != NULL)
163 #ifdef ALL_THREADS_STOPPED
164 /* First count this active thread. */
168 result = handle_descr (ta, callback, cbdata_p, state, ti_pri, cnt,