diff options
Diffstat (limited to 'linuxthreads_db/td_ta_thr_iter.c')
| -rw-r--r-- | linuxthreads_db/td_ta_thr_iter.c | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/linuxthreads_db/td_ta_thr_iter.c b/linuxthreads_db/td_ta_thr_iter.c new file mode 100644 index 0000000000..9ab04e14e3 --- /dev/null +++ b/linuxthreads_db/td_ta_thr_iter.c @@ -0,0 +1,176 @@ +/* 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#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 USE_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; +} |