freebsd-dev/lib/libthread_db/thread_db.c
Marcel Moolenaar 03fad2ad5f Allow psaddr_t to be widened by using thr_pread_{int,long,ptr},
where critical. Some places still use ps_pread/ps_pwrite directly,
but only need changed when byte-order comes into the picture.
Also, change th_p in td_event_msg_t from a pointer type to
psaddr_t, so that events also work when psaddr_t is widened.
2008-09-14 16:07:21 +00:00

435 lines
9.2 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 <sys/cdefs.h>
#include <sys/endian.h>
#include <sys/errno.h>
#include <sys/linker_set.h>
#include "thread_db_int.h"
struct td_thragent
{
TD_THRAGENT_FIELDS;
};
static TAILQ_HEAD(, td_thragent) proclist = TAILQ_HEAD_INITIALIZER(proclist);
SET_DECLARE(__ta_ops, struct ta_ops);
td_err_e
td_init(void)
{
td_err_e ret, tmp;
struct ta_ops *ops_p, **ops_pp;
ret = 0;
SET_FOREACH(ops_pp, __ta_ops) {
ops_p = *ops_pp;
if (ops_p->to_init != NULL) {
tmp = ops_p->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)
{
struct ta_ops *ops_p, **ops_pp;
SET_FOREACH(ops_pp, __ta_ops) {
ops_p = *ops_pp;
if (ops_p->to_ta_new(ph, pta) == TD_OK) {
TAILQ_INSERT_HEAD(&proclist, *pta, ta_next);
(*pta)->ta_ops = ops_p;
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));
}
#ifdef __i386__
td_err_e
td_thr_getxmmregs(const td_thrhandle_t *th, char *fxsave)
{
const td_thragent_t *ta = th->th_ta;
return (ta->ta_ops->to_thr_getxmmregs(th, fxsave));
}
#endif
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));
}
#ifdef __i386__
td_err_e
td_thr_setxmmregs(const td_thrhandle_t *th, const char *fxsave)
{
const td_thragent_t *ta = th->th_ta;
return (ta->ta_ops->to_thr_setxmmregs(th, fxsave));
}
#endif
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, psaddr_t linkmap, size_t offset,
psaddr_t *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));
}
/*
* Support functions for reading from and writing to the target
* address space.
*/
static int
thr_pread(struct ps_prochandle *ph, psaddr_t addr, uint64_t *val,
u_int size, u_int byteorder)
{
uint8_t buf[sizeof(*val)];
ps_err_e err;
if (size > sizeof(buf))
return (EOVERFLOW);
err = ps_pread(ph, addr, buf, size);
if (err != PS_OK)
return (EFAULT);
switch (byteorder) {
case BIG_ENDIAN:
switch (size) {
case 1:
*val = buf[0];
break;
case 2:
*val = be16dec(buf);
break;
case 4:
*val = be32dec(buf);
break;
case 8:
*val = be64dec(buf);
break;
default:
return (EINVAL);
}
break;
case LITTLE_ENDIAN:
switch (size) {
case 1:
*val = buf[0];
break;
case 2:
*val = le16dec(buf);
break;
case 4:
*val = le32dec(buf);
break;
case 8:
*val = le64dec(buf);
break;
default:
return (EINVAL);
}
break;
default:
return (EINVAL);
}
return (0);
}
int
thr_pread_int(const struct td_thragent *ta, psaddr_t addr, uint32_t *val)
{
uint64_t tmp;
int error;
error = thr_pread(ta->ph, addr, &tmp, sizeof(int), BYTE_ORDER);
if (!error)
*val = tmp;
return (error);
}
int
thr_pread_long(const struct td_thragent *ta, psaddr_t addr, uint64_t *val)
{
return (thr_pread(ta->ph, addr, val, sizeof(long), BYTE_ORDER));
}
int
thr_pread_ptr(const struct td_thragent *ta, psaddr_t addr, psaddr_t *val)
{
uint64_t tmp;
int error;
error = thr_pread(ta->ph, addr, &tmp, sizeof(void *), BYTE_ORDER);
if (!error)
*val = tmp;
return (error);
}
static int
thr_pwrite(struct ps_prochandle *ph, psaddr_t addr, uint64_t val,
u_int size, u_int byteorder)
{
uint8_t buf[sizeof(val)];
ps_err_e err;
if (size > sizeof(buf))
return (EOVERFLOW);
switch (byteorder) {
case BIG_ENDIAN:
switch (size) {
case 1:
buf[0] = (uint8_t)val;
break;
case 2:
be16enc(buf, (uint16_t)val);
break;
case 4:
be32enc(buf, (uint32_t)val);
break;
case 8:
be64enc(buf, (uint64_t)val);
break;
default:
return (EINVAL);
}
break;
case LITTLE_ENDIAN:
switch (size) {
case 1:
buf[0] = (uint8_t)val;
break;
case 2:
le16enc(buf, (uint16_t)val);
break;
case 4:
le32enc(buf, (uint32_t)val);
break;
case 8:
le64enc(buf, (uint64_t)val);
break;
default:
return (EINVAL);
}
break;
default:
return (EINVAL);
}
err = ps_pwrite(ph, addr, buf, size);
return ((err != PS_OK) ? EFAULT : 0);
}
int
thr_pwrite_int(const struct td_thragent *ta, psaddr_t addr, uint32_t val)
{
return (thr_pwrite(ta->ph, addr, val, sizeof(int), BYTE_ORDER));
}
int
thr_pwrite_long(const struct td_thragent *ta, psaddr_t addr, uint64_t val)
{
return (thr_pwrite(ta->ph, addr, val, sizeof(long), BYTE_ORDER));
}
int
thr_pwrite_ptr(const struct td_thragent *ta, psaddr_t addr, psaddr_t val)
{
return (thr_pwrite(ta->ph, addr, val, sizeof(void *), BYTE_ORDER));
}