mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-14 15:20:04 +00:00
155 lines
4.8 KiB
C
155 lines
4.8 KiB
C
/* Attach to target process.
|
|
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 <stddef.h>
|
|
#include <stdlib.h>
|
|
#include <gnu/lib-names.h>
|
|
|
|
#include "thread_dbP.h"
|
|
|
|
|
|
/* Datatype for the list of known thread agents. Normally there will
|
|
be exactly one so we don't spend much though on making it fast. */
|
|
struct agent_list *__td_agent_list;
|
|
|
|
|
|
td_err_e
|
|
td_ta_new (struct ps_prochandle *ps, td_thragent_t **ta)
|
|
{
|
|
psaddr_t addr;
|
|
struct agent_list *elemp;
|
|
|
|
LOG (__FUNCTION__);
|
|
|
|
/* Get the global event mask. This is one of the variables which
|
|
are new in the thread library to enable debugging. If it is
|
|
not available we cannot debug. */
|
|
if (ps_pglobal_lookup (ps, LIBPTHREAD_SO,
|
|
"__pthread_threads_events", &addr) != PS_OK)
|
|
return TD_NOLIBTHREAD;
|
|
|
|
/* Fill in the appropriate information. */
|
|
*ta = (td_thragent_t *) malloc (sizeof (td_thragent_t));
|
|
if (*ta == NULL)
|
|
return TD_MALLOC;
|
|
|
|
/* Store the proc handle which we will pass to the callback functions
|
|
back into the debugger. */
|
|
(*ta)->ph = ps;
|
|
|
|
/* Remember the address. */
|
|
(*ta)->pthread_threads_eventsp = (td_thr_events_t *) addr;
|
|
|
|
/* Get the pointer to the variable pointing to the thread descriptor
|
|
with the last event. */
|
|
if (ps_pglobal_lookup (ps, LIBPTHREAD_SO,
|
|
"__pthread_last_event",
|
|
&(*ta)->pthread_last_event) != PS_OK)
|
|
{
|
|
free_return:
|
|
free (*ta);
|
|
return TD_ERR;
|
|
}
|
|
|
|
/* Get the pointer to the variable containing the number of active
|
|
threads. */
|
|
if (ps_pglobal_lookup (ps, LIBPTHREAD_SO,
|
|
"__pthread_handles_num",
|
|
&(*ta)->pthread_handles_num) != PS_OK)
|
|
goto free_return;
|
|
|
|
/* See whether the library contains the necessary symbols. */
|
|
if (ps_pglobal_lookup (ps, LIBPTHREAD_SO, "__pthread_handles",
|
|
&addr) != PS_OK)
|
|
goto free_return;
|
|
|
|
(*ta)->handles = (struct pthread_handle_struct *) addr;
|
|
|
|
|
|
if (ps_pglobal_lookup (ps, LIBPTHREAD_SO, "pthread_keys",
|
|
&addr) != PS_OK)
|
|
goto free_return;
|
|
|
|
/* Cast to the right type. */
|
|
(*ta)->keys = (struct pthread_key_struct *) addr;
|
|
|
|
/* Find out about the maximum number of threads. Old implementations
|
|
don't provide this information. In this case we assume that the
|
|
debug library is compiled with the same values. */
|
|
if (ps_pglobal_lookup (ps, LIBPTHREAD_SO,
|
|
"__linuxthreads_pthread_threads_max", &addr) != PS_OK)
|
|
(*ta)->pthread_threads_max = PTHREAD_THREADS_MAX;
|
|
else
|
|
{
|
|
if (ps_pdread (ps, addr, &(*ta)->pthread_threads_max, sizeof (int))
|
|
!= PS_OK)
|
|
goto free_return;
|
|
}
|
|
|
|
/* Similar for the maximum number of thread local data keys. */
|
|
if (ps_pglobal_lookup (ps, LIBPTHREAD_SO,
|
|
"__linuxthreads_pthread_keys_max", &addr) != PS_OK)
|
|
(*ta)->pthread_keys_max = PTHREAD_KEYS_MAX;
|
|
else
|
|
{
|
|
if (ps_pdread (ps, addr, &(*ta)->pthread_keys_max, sizeof (int))
|
|
!= PS_OK)
|
|
goto free_return;
|
|
}
|
|
|
|
/* And for the size of the second level arrays for the keys. */
|
|
if (ps_pglobal_lookup (ps, LIBPTHREAD_SO,
|
|
"__linuxthreads_pthread_sizeof_descr", &addr)
|
|
!= PS_OK)
|
|
(*ta)->sizeof_descr = sizeof (struct _pthread_descr_struct);
|
|
else
|
|
{
|
|
if (ps_pdread (ps, addr, &(*ta)->sizeof_descr, sizeof (int)) != PS_OK)
|
|
goto free_return;
|
|
}
|
|
|
|
/* Similar for the maximum number of thread local data keys. */
|
|
if (ps_pglobal_lookup (ps, LIBPTHREAD_SO,
|
|
"__linuxthreads_pthread_keys_max", &addr) != PS_OK)
|
|
(*ta)->pthread_keys_max = PTHREAD_KEYS_MAX;
|
|
else
|
|
{
|
|
if (ps_pdread (ps, addr, &(*ta)->pthread_keys_max, sizeof (int))
|
|
!= PS_OK)
|
|
goto free_return;
|
|
}
|
|
|
|
/* Now add the new agent descriptor to the list. */
|
|
elemp = (struct agent_list *) malloc (sizeof (struct agent_list));
|
|
if (elemp == NULL)
|
|
{
|
|
/* Argh, now that everything else worked... */
|
|
free (*ta);
|
|
return TD_MALLOC;
|
|
}
|
|
|
|
/* We don't care for thread-safety here. */
|
|
elemp->ta = *ta;
|
|
elemp->next = __td_agent_list;
|
|
__td_agent_list = elemp;
|
|
|
|
return TD_OK;
|
|
}
|