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/* Attach to target process.
Copyright (C) 1999,2001,2002,2003,2009 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.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 <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <version.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. */
LIST_HEAD (__td_agent_list);
static td_err_e
check_version (struct ps_prochandle *ps, psaddr_t versaddr)
{
char versbuf[sizeof (VERSION)];
if (versaddr == 0)
return TD_NOLIBTHREAD;
if (ps_pdread (ps, versaddr, versbuf, sizeof (versbuf)) != PS_OK)
return TD_ERR;
if (memcmp (versbuf, VERSION, sizeof VERSION) != 0)
/* Not the right version. */
return TD_VERSION;
return TD_OK;
}
td_err_e
td_ta_new (struct ps_prochandle *ps, td_thragent_t **ta)
{
psaddr_t versaddr = 0;
psaddr_t dl_versaddr = 0;
LOG ("td_ta_new");
/* Check whether the versions match. */
if (td_lookup_1 (ps, SYM_nptl_version, &versaddr, false) != PS_OK
&& td_lookup_1 (ps, SYM__thread_db_dl_nptl_version,
&dl_versaddr, true) != PS_OK)
return TD_NOLIBTHREAD;
td_err_e result = check_version (ps, versaddr ?: dl_versaddr);
if (result != TD_OK)
return result;
/* Fill in the appropriate information. */
*ta = (td_thragent_t *) calloc (1, sizeof (td_thragent_t));
if (*ta == NULL)
return TD_MALLOC;
(*ta)->ta_addr_nptl_version = versaddr;
(*ta)->ta_addr__thread_db_dl_nptl_version = dl_versaddr;
/* Store the proc handle which we will pass to the callback functions
back into the debugger. */
(*ta)->ph = ps;
/* Now add the new agent descriptor to the list. */
list_add (&(*ta)->list, &__td_agent_list);
return TD_OK;
}
td_err_e
_td_ta_check_nptl (td_thragent_t *ta)
{
if (ta->ta_addr_nptl_version != 0)
return TD_OK;
if (ta->ta_addr__thread_db_dl_nptl_version == 0)
return TD_BADTA;
psaddr_t versaddr = 0;
if (td_lookup_1 (ta->ph, SYM_nptl_version, &versaddr, false) != PS_OK)
return TD_NOLIBTHREAD;
td_err_e result = check_version (ta->ph, versaddr);
if (result == TD_OK)
ta->ta_addr_nptl_version = versaddr;
return result;
}
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