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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 | /* Iterate over a process's threads. Copyright (C) 1999,2000,2001,2002,2003 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 Lesser General Public License as published by the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ #include "thread_dbP.h" #include <linuxthreads/internals.h> #include <alloca.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 (descr == NULL) { /* No descriptor (yet). */ if (cnt == 0) { /* This is the main thread. Create a fake descriptor. */ memset (&pds, '\0', sizeof (pds)); /* Empty thread descriptor the thread library would create. */ #if !defined __UCLIBC_HAS_TLS__ || !TLS_DTV_AT_TP pds.p_header.data.self = &pds; #endif pds.p_nextlive = pds.p_prevlive = &pds; pds.p_tid = PTHREAD_THREADS_MAX; /* The init code also sets up p_lock, p_errnop, p_herrnop, and p_userstack but this should not be necessary here. */ th.th_ta_p = (td_thragent_t *) ta; th.th_unique = NULL; if (callback (&th, cbdata_p) != 0) return TD_DBERR; /* All done successfully. */ return TD_OK; } else if (cnt == 1) /* The manager is not yet started. No big deal. */ return TD_OK; else /* For every other thread this should not happen. */ return TD_ERR; } 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 ("td_ta_thr_iter"); /* 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; } |