FreeBSD-5.3/lib/libthread_db/libc_r_db.c
/*
* Copyright (c) 2004 Marcel Moolenaar
* 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 ``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 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: src/lib/libthread_db/libc_r_db.c,v 1.1 2004/07/18 04:17:13 marcel Exp $");
#include <machine/setjmp.h>
#include <proc_service.h>
#include <stdlib.h>
#include <string.h>
#include <thread_db.h>
#include "thread_db_int.h"
void libc_r_md_getfpregs(jmp_buf jb, prfpregset_t *);
void libc_r_md_getgregs(jmp_buf jb, prgregset_t);
struct td_thragent {
TD_THRAGENT_FIELDS;
struct ps_prochandle *ta_ph;
psaddr_t ta_thread_initial;
psaddr_t ta_thread_list;
psaddr_t ta_thread_run;
int ta_ofs_ctx;
int ta_ofs_next;
int ta_ofs_uniqueid;
};
static td_err_e
libc_r_db_init()
{
return (TD_OK);
}
static td_err_e
libc_r_db_ta_clear_event(const td_thragent_t *ta, td_thr_events_t *ev)
{
return (TD_ERR);
}
static td_err_e
libc_r_db_ta_delete(td_thragent_t *ta)
{
free(ta);
return (TD_OK);
}
static td_err_e
libc_r_db_ta_event_addr(const td_thragent_t *ta, td_thr_events_e ev,
td_notify_t *n)
{
return (TD_ERR);
}
static td_err_e
libc_r_db_ta_event_getmsg(const td_thragent_t *ta, td_event_msg_t *msg)
{
return (TD_ERR);
}
static td_err_e
libc_r_db_ta_map_id2thr(const td_thragent_t *ta, thread_t tid,
td_thrhandle_t *th)
{
return (TD_ERR);
}
static td_err_e
libc_r_db_ta_map_lwp2thr(const td_thragent_t *ta, lwpid_t lwpid,
td_thrhandle_t *th)
{
psaddr_t addr;
ps_err_e err;
th->th_ta = ta;
err = ps_pread(ta->ta_ph, ta->ta_thread_initial, &addr, sizeof(addr));
if (err != PS_OK)
return (TD_ERR);
if (addr == NULL)
return (TD_NOLWP);
err = ps_pread(ta->ta_ph, ta->ta_thread_run, &th->th_thread,
sizeof(psaddr_t));
return ((err == PS_OK) ? TD_OK : TD_ERR);
}
static td_err_e
libc_r_db_ta_new(struct ps_prochandle *ph, td_thragent_t **ta_p)
{
td_thragent_t *ta;
psaddr_t addr;
ps_err_e err;
ta = malloc(sizeof(td_thragent_t));
if (ta == NULL)
return (TD_MALLOC);
ta->ta_ph = ph;
err = ps_pglobal_lookup(ph, NULL, "_thread_initial",
&ta->ta_thread_initial);
if (err != PS_OK)
goto fail;
err = ps_pglobal_lookup(ph, NULL, "_thread_list", &ta->ta_thread_list);
if (err != PS_OK)
goto fail;
err = ps_pglobal_lookup(ph, NULL, "_thread_run", &ta->ta_thread_run);
if (err != PS_OK)
goto fail;
err = ps_pglobal_lookup(ph, NULL, "_thread_ctx_offset", &addr);
if (err != PS_OK)
goto fail;
err = ps_pread(ph, addr, &ta->ta_ofs_ctx, sizeof(int));
if (err != PS_OK)
goto fail;
err = ps_pglobal_lookup(ph, NULL, "_thread_next_offset", &addr);
if (err != PS_OK)
goto fail;
err = ps_pread(ph, addr, &ta->ta_ofs_next, sizeof(int));
if (err != PS_OK)
goto fail;
err = ps_pglobal_lookup(ph, NULL, "_thread_uniqueid_offset", &addr);
if (err != PS_OK)
goto fail;
err = ps_pread(ph, addr, &ta->ta_ofs_uniqueid, sizeof(int));
if (err != PS_OK)
goto fail;
*ta_p = ta;
return (TD_OK);
fail:
free(ta);
*ta_p = NULL;
return (TD_ERR);
}
static td_err_e
libc_r_db_ta_set_event(const td_thragent_t *ta, td_thr_events_t *ev)
{
return (TD_ERR);
}
static td_err_e
libc_r_db_ta_thr_iter(const td_thragent_t *ta, td_thr_iter_f *cb, void *data,
td_thr_state_e state, int pri, sigset_t *mask, unsigned int flags)
{
td_thrhandle_t th;
psaddr_t addr;
ps_err_e err;
th.th_ta = ta;
err = ps_pread(ta->ta_ph, ta->ta_thread_list, &th.th_thread,
sizeof(th.th_thread));
if (err != PS_OK)
return (TD_ERR);
while (th.th_thread != NULL) {
if (cb(&th, data) != 0)
return (TD_OK);
addr = (psaddr_t)((uintptr_t)th.th_thread + ta->ta_ofs_next);
err = ps_pread(ta->ta_ph, addr, &th.th_thread,
sizeof(th.th_thread));
if (err != PS_OK)
return (TD_ERR);
}
return (TD_OK);
}
static td_err_e
libc_r_db_thr_clear_event(const td_thrhandle_t *th, td_thr_events_t *ev)
{
return (TD_ERR);
}
static td_err_e
libc_r_db_thr_event_enable(const td_thrhandle_t *th, int oo)
{
return (TD_ERR);
}
static td_err_e
libc_r_db_thr_event_getmsg(const td_thrhandle_t *th, td_event_msg_t *msg)
{
return (TD_ERR);
}
static td_err_e
libc_r_db_thr_get_info(const td_thrhandle_t *th, td_thrinfo_t *ti)
{
const td_thragent_t *ta;
psaddr_t addr, current;
ps_err_e err;
ta = th->th_ta;
ti->ti_ta_p = ta;
err = ps_pread(ta->ta_ph, ta->ta_thread_run, ¤t,
sizeof(psaddr_t));
if (err != PS_OK)
return (TD_ERR);
ti->ti_lid = (th->th_thread == current) ? -1 : 0;
addr = (psaddr_t)((uintptr_t)th->th_thread + ta->ta_ofs_uniqueid);
err = ps_pread(ta->ta_ph, addr, &ti->ti_tid, sizeof(thread_t));
/* libc_r numbers its threads starting with 0. Not smart. */
ti->ti_tid++;
return ((err == PS_OK) ? TD_OK : TD_ERR);
}
static td_err_e
libc_r_db_thr_getfpregs(const td_thrhandle_t *th, prfpregset_t *r)
{
jmp_buf jb;
const td_thragent_t *ta;
psaddr_t addr;
ps_err_e err;
ta = th->th_ta;
err = ps_lgetfpregs(ta->ta_ph, -1, r);
if (err != PS_OK)
return (TD_ERR);
err = ps_pread(ta->ta_ph, ta->ta_thread_run, &addr, sizeof(psaddr_t));
if (err != PS_OK)
return (TD_ERR);
if (th->th_thread == addr)
return (TD_OK);
addr = (psaddr_t)((uintptr_t)th->th_thread + ta->ta_ofs_ctx);
err = ps_pread(ta->ta_ph, addr, jb, sizeof(jb));
if (err != PS_OK)
return (TD_ERR);
libc_r_md_getfpregs(jb, r);
return (TD_OK);
}
static td_err_e
libc_r_db_thr_getgregs(const td_thrhandle_t *th, prgregset_t r)
{
jmp_buf jb;
const td_thragent_t *ta;
psaddr_t addr;
ps_err_e err;
ta = th->th_ta;
err = ps_lgetregs(ta->ta_ph, -1, r);
if (err != PS_OK)
return (TD_ERR);
err = ps_pread(ta->ta_ph, ta->ta_thread_run, &addr, sizeof(psaddr_t));
if (err != PS_OK)
return (TD_ERR);
if (th->th_thread == addr)
return (TD_OK);
addr = (psaddr_t)((uintptr_t)th->th_thread + ta->ta_ofs_ctx);
err = ps_pread(ta->ta_ph, addr, jb, sizeof(jb));
if (err != PS_OK)
return (TD_ERR);
libc_r_md_getgregs(jb, r);
return (TD_OK);
}
static td_err_e
libc_r_db_thr_set_event(const td_thrhandle_t *th, td_thr_events_t *ev)
{
return (TD_ERR);
}
static td_err_e
libc_r_db_thr_setfpregs(const td_thrhandle_t *th, const prfpregset_t *r)
{
return (TD_ERR);
}
static td_err_e
libc_r_db_thr_setgregs(const td_thrhandle_t *th, const prgregset_t r)
{
return (TD_ERR);
}
static td_err_e
libc_r_db_thr_validate(const td_thrhandle_t *th)
{
return (TD_ERR);
}
struct ta_ops libc_r_db_ops = {
.to_init = libc_r_db_init,
.to_ta_clear_event = libc_r_db_ta_clear_event,
.to_ta_delete = libc_r_db_ta_delete,
.to_ta_event_addr = libc_r_db_ta_event_addr,
.to_ta_event_getmsg = libc_r_db_ta_event_getmsg,
.to_ta_map_id2thr = libc_r_db_ta_map_id2thr,
.to_ta_map_lwp2thr = libc_r_db_ta_map_lwp2thr,
.to_ta_new = libc_r_db_ta_new,
.to_ta_set_event = libc_r_db_ta_set_event,
.to_ta_thr_iter = libc_r_db_ta_thr_iter,
.to_thr_clear_event = libc_r_db_thr_clear_event,
.to_thr_event_enable = libc_r_db_thr_event_enable,
.to_thr_event_getmsg = libc_r_db_thr_event_getmsg,
.to_thr_get_info = libc_r_db_thr_get_info,
.to_thr_getfpregs = libc_r_db_thr_getfpregs,
.to_thr_getgregs = libc_r_db_thr_getgregs,
.to_thr_set_event = libc_r_db_thr_set_event,
.to_thr_setfpregs = libc_r_db_thr_setfpregs,
.to_thr_setgregs = libc_r_db_thr_setgregs,
.to_thr_validate = libc_r_db_thr_validate
};