freebsd-dev/lib/libthread_db/thread_db.c
David Xu 3e93cc3ae3 1.Use new way to check if a thread is in critical region, defer suspending
if it is true.
2.Add thread_db api td_thr_tls_get_addr to get tls address, the real code
  is commented out util tls patch is committed.

Reviewed by: deischen
2004-08-08 22:37:53 +00:00

245 lines
6.0 KiB
C

/*
* Copyright (c) 2004 David Xu <davidxu@freebsd.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <proc_service.h>
#include <stddef.h>
#include <thread_db.h>
#include <unistd.h>
#include "thread_db_int.h"
struct td_thragent
{
TD_THRAGENT_FIELDS;
};
static TAILQ_HEAD(, td_thragent) proclist = TAILQ_HEAD_INITIALIZER(proclist);
extern struct ta_ops libc_r_db_ops;
extern struct ta_ops libpthread_db_ops;
extern struct ta_ops libthr_db_ops;
static struct ta_ops *ops[] = {
&libpthread_db_ops,
&libthr_db_ops,
&libc_r_db_ops
};
td_err_e
td_init(void)
{
td_err_e ret, tmp;
size_t i;
ret = 0;
for (i = 0; i < sizeof(ops)/sizeof(ops[0]); i++) {
if (ops[i]->to_init != NULL) {
tmp = ops[i]->to_init();
if (tmp != TD_OK)
ret = tmp;
}
}
return (ret);
}
td_err_e
td_ta_clear_event(const td_thragent_t *ta, td_thr_events_t *events)
{
return (ta->ta_ops->to_ta_clear_event(ta, events));
}
td_err_e
td_ta_delete(td_thragent_t *ta)
{
TAILQ_REMOVE(&proclist, ta, ta_next);
return (ta->ta_ops->to_ta_delete(ta));
}
td_err_e
td_ta_event_addr(const td_thragent_t *ta, td_event_e event, td_notify_t *ptr)
{
return (ta->ta_ops->to_ta_event_addr(ta, event, ptr));
}
td_err_e
td_ta_event_getmsg(const td_thragent_t *ta, td_event_msg_t *msg)
{
return (ta->ta_ops->to_ta_event_getmsg(ta, msg));
}
td_err_e
td_ta_map_id2thr(const td_thragent_t *ta, thread_t id, td_thrhandle_t *th)
{
return (ta->ta_ops->to_ta_map_id2thr(ta, id, th));
}
td_err_e
td_ta_map_lwp2thr(const td_thragent_t *ta, lwpid_t lwpid, td_thrhandle_t *th)
{
return (ta->ta_ops->to_ta_map_lwp2thr(ta, lwpid, th));
}
td_err_e
td_ta_new(struct ps_prochandle *ph, td_thragent_t **pta)
{
size_t i;
for (i = 0; i < sizeof(ops)/sizeof(ops[0]); ++i) {
if (ops[i]->to_ta_new(ph, pta) == TD_OK) {
TAILQ_INSERT_HEAD(&proclist, *pta, ta_next);
(*pta)->ta_ops = ops[i];
return (TD_OK);
}
}
return (TD_NOLIBTHREAD);
}
td_err_e
td_ta_set_event(const td_thragent_t *ta, td_thr_events_t *events)
{
return (ta->ta_ops->to_ta_set_event(ta, events));
}
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)
{
return (ta->ta_ops->to_ta_thr_iter(ta, callback, cbdata_p, state,
ti_pri, ti_sigmask_p, ti_user_flags));
}
td_err_e
td_ta_tsd_iter(const td_thragent_t *ta, td_key_iter_f *callback,
void *cbdata_p)
{
return (ta->ta_ops->to_ta_tsd_iter(ta, callback, cbdata_p));
}
td_err_e
td_thr_clear_event(const td_thrhandle_t *th, td_thr_events_t *events)
{
const td_thragent_t *ta = th->th_ta;
return (ta->ta_ops->to_thr_clear_event(th, events));
}
td_err_e
td_thr_dbresume(const td_thrhandle_t *th)
{
const td_thragent_t *ta = th->th_ta;
return (ta->ta_ops->to_thr_dbresume(th));
}
td_err_e
td_thr_dbsuspend(const td_thrhandle_t *th)
{
const td_thragent_t *ta = th->th_ta;
return (ta->ta_ops->to_thr_dbsuspend(th));
}
td_err_e
td_thr_event_enable(const td_thrhandle_t *th, int en)
{
const td_thragent_t *ta = th->th_ta;
return (ta->ta_ops->to_thr_event_enable(th, en));
}
td_err_e
td_thr_event_getmsg(const td_thrhandle_t *th, td_event_msg_t *msg)
{
const td_thragent_t *ta = th->th_ta;
return (ta->ta_ops->to_thr_event_getmsg(th, msg));
}
td_err_e
td_thr_get_info(const td_thrhandle_t *th, td_thrinfo_t *info)
{
const td_thragent_t *ta = th->th_ta;
return (ta->ta_ops->to_thr_get_info(th, info));
}
td_err_e
td_thr_getfpregs(const td_thrhandle_t *th, prfpregset_t *fpregset)
{
const td_thragent_t *ta = th->th_ta;
return (ta->ta_ops->to_thr_getfpregs(th, fpregset));
}
td_err_e
td_thr_getgregs(const td_thrhandle_t *th, prgregset_t gregs)
{
const td_thragent_t *ta = th->th_ta;
return (ta->ta_ops->to_thr_getgregs(th, gregs));
}
td_err_e
td_thr_set_event(const td_thrhandle_t *th, td_thr_events_t *events)
{
const td_thragent_t *ta = th->th_ta;
return (ta->ta_ops->to_thr_set_event(th, events));
}
td_err_e
td_thr_setfpregs(const td_thrhandle_t *th, const prfpregset_t *fpregs)
{
const td_thragent_t *ta = th->th_ta;
return (ta->ta_ops->to_thr_setfpregs(th, fpregs));
}
td_err_e
td_thr_setgregs(const td_thrhandle_t *th, const prgregset_t gregs)
{
const td_thragent_t *ta = th->th_ta;
return (ta->ta_ops->to_thr_setgregs(th, gregs));
}
td_err_e
td_thr_validate(const td_thrhandle_t *th)
{
const td_thragent_t *ta = th->th_ta;
return (ta->ta_ops->to_thr_validate(th));
}
td_err_e
td_thr_tls_get_addr(const td_thrhandle_t *th, void *linkmap, size_t offset,
void **address)
{
const td_thragent_t *ta = th->th_ta;
return (ta->ta_ops->to_thr_tls_get_addr(th, linkmap, offset, address));
}
/* FreeBSD specific extensions. */
td_err_e
td_thr_sstep(const td_thrhandle_t *th, int step)
{
const td_thragent_t *ta = th->th_ta;
return (ta->ta_ops->to_thr_sstep(th, step));
}