d4ee712657
2. Implement functions: libthr_db_thr_setfpregs, libthr_db_thr_setregs, libthr_db_ta_map_id2thr. 3. simplify libthr_db_thr_getfpregs, libthr_db_thr_getgregs.
369 lines
8.9 KiB
C
369 lines
8.9 KiB
C
/*
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* Copyright (c) 2004 Marcel Moolenaar
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <proc_service.h>
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#include <stdlib.h>
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#include <thread_db.h>
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#include "thread_db_int.h"
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struct td_thragent {
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TD_THRAGENT_FIELDS;
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struct ps_prochandle *ta_ph;
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psaddr_t ta_thread_list;
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int ta_ofs_ctx;
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int ta_ofs_next;
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int ta_ofs_thr_id;
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};
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static td_err_e
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libthr_db_init()
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{
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return (TD_OK);
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}
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static td_err_e
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libthr_db_ta_clear_event(const td_thragent_t *ta, td_thr_events_t *ev)
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{
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return (TD_ERR);
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}
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static td_err_e
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libthr_db_ta_delete(td_thragent_t *ta)
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{
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free(ta);
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return (TD_OK);
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}
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static td_err_e
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libthr_db_ta_event_addr(const td_thragent_t *ta, td_thr_events_e event,
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td_notify_t *n)
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{
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return (TD_ERR);
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}
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static td_err_e
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libthr_db_ta_event_getmsg(const td_thragent_t *ta, td_event_msg_t *msg)
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{
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return (TD_ERR);
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}
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static td_err_e
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libthr_db_ta_map_id2thr(const td_thragent_t *ta, thread_t tid,
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td_thrhandle_t *th)
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{
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psaddr_t addr;
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ps_err_e err;
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thread_t lwpid;
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th->th_ta = ta;
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err = ps_pread(ta->ta_ph, ta->ta_thread_list, &th->th_thread,
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sizeof(th->th_thread));
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if (err != PS_OK)
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return (TD_ERR);
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while (th->th_thread != NULL) {
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addr = (psaddr_t)((uintptr_t)th->th_thread +
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ta->ta_ofs_thr_id);
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err = ps_pread(ta->ta_ph, addr, &lwpid, sizeof(thread_t));
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if (err != PS_OK)
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return (TD_ERR);
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if (tid == lwpid) {
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th->th_tid = tid;
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return (TD_OK);
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}
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addr = (psaddr_t)((uintptr_t)th->th_thread + ta->ta_ofs_next);
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err = ps_pread(ta->ta_ph, addr, &th->th_thread,
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sizeof(th->th_thread));
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if (err != PS_OK)
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return (TD_ERR);
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}
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return (TD_NOTHR);
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}
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static td_err_e
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libthr_db_ta_map_lwp2thr(const td_thragent_t *ta, lwpid_t lwpid,
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td_thrhandle_t *th)
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{
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psaddr_t addr;
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thread_t tid;
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ps_err_e err;
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th->th_ta = ta;
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err = ps_pread(ta->ta_ph, ta->ta_thread_list, &th->th_thread,
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sizeof(th->th_thread));
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if (err != PS_OK)
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return (TD_ERR);
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while (th->th_thread != NULL) {
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addr = (psaddr_t)((uintptr_t)th->th_thread +
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ta->ta_ofs_thr_id);
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err = ps_pread(ta->ta_ph, addr, &tid, sizeof(thread_t));
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if (err != PS_OK)
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return (TD_ERR);
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if (tid == lwpid) {
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th->th_tid = tid;
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return (TD_OK);
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}
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addr = (psaddr_t)((uintptr_t)th->th_thread + ta->ta_ofs_next);
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err = ps_pread(ta->ta_ph, addr, &th->th_thread,
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sizeof(th->th_thread));
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if (err != PS_OK)
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return (TD_ERR);
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}
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return (TD_ERR);
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}
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static td_err_e
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libthr_db_ta_new(struct ps_prochandle *ph, td_thragent_t **ta_p)
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{
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td_thragent_t *ta;
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psaddr_t addr;
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ps_err_e err;
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err = ps_pglobal_lookup(ph, NULL, "_libthr_debug", &addr);
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if (err != PS_OK)
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return (TD_NOLIBTHREAD);
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ta = malloc(sizeof(td_thragent_t));
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if (ta == NULL)
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return (TD_MALLOC);
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ta->ta_ph = ph;
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err = ps_pglobal_lookup(ph, NULL, "_thread_list", &ta->ta_thread_list);
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if (err != PS_OK)
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goto fail;
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err = ps_pglobal_lookup(ph, NULL, "_thread_ctx_offset", &addr);
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if (err != PS_OK)
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goto fail;
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err = ps_pread(ph, addr, &ta->ta_ofs_ctx, sizeof(int));
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if (err != PS_OK)
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goto fail;
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err = ps_pglobal_lookup(ph, NULL, "_thread_next_offset", &addr);
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if (err != PS_OK)
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goto fail;
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err = ps_pread(ph, addr, &ta->ta_ofs_next, sizeof(int));
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if (err != PS_OK)
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goto fail;
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err = ps_pglobal_lookup(ph, NULL, "_thread_thr_id_offset", &addr);
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if (err != PS_OK)
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goto fail;
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err = ps_pread(ph, addr, &ta->ta_ofs_thr_id, sizeof(int));
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if (err != PS_OK)
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goto fail;
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*ta_p = ta;
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return (TD_OK);
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fail:
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free(ta);
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*ta_p = NULL;
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return (TD_ERR);
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}
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static td_err_e
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libthr_db_ta_set_event(const td_thragent_t *ta, td_thr_events_t *ev)
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{
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return (TD_ERR);
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}
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static td_err_e
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libthr_db_ta_thr_iter(const td_thragent_t *ta, td_thr_iter_f *cb, void *data,
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td_thr_state_e state, int pri, sigset_t *mask, unsigned int flags)
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{
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td_thrhandle_t th;
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psaddr_t addr;
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ps_err_e err;
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th.th_ta = ta;
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err = ps_pread(ta->ta_ph, ta->ta_thread_list, &th.th_thread,
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sizeof(th.th_thread));
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if (err != PS_OK)
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return (TD_ERR);
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while (th.th_thread != NULL) {
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addr = (psaddr_t)((uintptr_t)th.th_thread +
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ta->ta_ofs_thr_id);
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err = ps_pread(ta->ta_ph, addr, &th.th_tid, sizeof(thread_t));
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if (err != PS_OK)
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return (TD_ERR);
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if (cb(&th, data) != 0)
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return (TD_OK);
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addr = (psaddr_t)((uintptr_t)th.th_thread + ta->ta_ofs_next);
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err = ps_pread(ta->ta_ph, addr, &th.th_thread,
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sizeof(th.th_thread));
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if (err != PS_OK)
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return (TD_ERR);
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}
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return (TD_OK);
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}
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static td_err_e
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libthr_db_thr_clear_event(const td_thrhandle_t *th, td_thr_events_t *ev)
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{
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return (TD_ERR);
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}
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static td_err_e
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libthr_dbresume(const td_thrhandle_t *th)
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{
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ps_err_e err;
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err = ps_lcontinue(th->th_ta->ta_ph, (lwpid_t)th->th_tid);
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return ((err == PS_OK) ? TD_OK : TD_ERR);
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}
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static td_err_e
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libthr_dbsuspend(const td_thrhandle_t *th)
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{
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ps_err_e err;
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err = ps_lstop(th->th_ta->ta_ph, (lwpid_t)th->th_tid);
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return ((err == PS_OK) ? TD_OK : TD_ERR);
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}
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static td_err_e
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libthr_db_thr_event_enable(const td_thrhandle_t *th, int oo)
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{
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return (TD_ERR);
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}
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static td_err_e
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libthr_db_thr_event_getmsg(const td_thrhandle_t *th, td_event_msg_t *msg)
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{
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return (TD_ERR);
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}
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static td_err_e
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libthr_db_thr_get_info(const td_thrhandle_t *th, td_thrinfo_t *ti)
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{
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const td_thragent_t *ta;
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psaddr_t addr;
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thread_t tid;
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ps_err_e err;
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ta = th->th_ta;
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ti->ti_ta_p = ta;
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addr = (psaddr_t)((uintptr_t)th->th_thread + ta->ta_ofs_thr_id);
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err = ps_pread(ta->ta_ph, addr, &tid, sizeof(thread_t));
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ti->ti_lid = tid;
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ti->ti_tid = tid;
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return ((err == PS_OK) ? TD_OK : TD_ERR);
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}
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static td_err_e
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libthr_db_thr_getfpregs(const td_thrhandle_t *th, prfpregset_t *r)
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{
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const td_thragent_t *ta;
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ps_err_e err;
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ta = th->th_ta;
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err = ps_lgetfpregs(ta->ta_ph, (lwpid_t)th->th_tid, r);
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return ((err == PS_OK) ? TD_OK : TD_ERR);
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}
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static td_err_e
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libthr_db_thr_getgregs(const td_thrhandle_t *th, prgregset_t r)
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{
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const td_thragent_t *ta;
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psaddr_t addr;
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ps_err_e err;
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ta = th->th_ta;
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err = ps_lgetregs(ta->ta_ph, (lwpid_t)th->th_tid, r);
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return ((err == PS_OK) ? TD_OK : TD_ERR);
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}
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static td_err_e
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libthr_db_thr_set_event(const td_thrhandle_t *th, td_thr_events_t *ev)
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{
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return (TD_ERR);
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}
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static td_err_e
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libthr_db_thr_setfpregs(const td_thrhandle_t *th, const prfpregset_t *r)
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{
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ps_err_e err;
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err = ps_lsetfpregs(th->th_ta->ta_ph, (lwpid_t)th->th_tid, r);
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return ((err == PS_OK) ? TD_OK : TD_ERR);
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}
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static td_err_e
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libthr_db_thr_setgregs(const td_thrhandle_t *th, const prgregset_t r)
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{
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ps_err_e err;
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err = ps_lsetregs(th->th_ta->ta_ph, (lwpid_t)th->th_tid, r);
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return ((err == PS_OK) ? TD_OK : TD_ERR);
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}
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static td_err_e
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libthr_db_thr_validate(const td_thrhandle_t *th)
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{
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return (TD_ERR);
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}
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static td_err_e
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libthr_db_sstep(const td_thrhandle_t *th, int step)
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{
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return (TD_OK);
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}
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struct ta_ops libthr_db_ops = {
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.to_init = libthr_db_init,
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.to_ta_clear_event = libthr_db_ta_clear_event,
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.to_ta_delete = libthr_db_ta_delete,
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.to_ta_event_addr = libthr_db_ta_event_addr,
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.to_ta_event_getmsg = libthr_db_ta_event_getmsg,
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.to_ta_map_id2thr = libthr_db_ta_map_id2thr,
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.to_ta_map_lwp2thr = libthr_db_ta_map_lwp2thr,
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.to_ta_new = libthr_db_ta_new,
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.to_ta_set_event = libthr_db_ta_set_event,
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.to_ta_thr_iter = libthr_db_ta_thr_iter,
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.to_thr_clear_event = libthr_db_thr_clear_event,
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.to_thr_dbresume = libthr_dbresume,
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.to_thr_dbsuspend = libthr_dbsuspend,
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.to_thr_event_enable = libthr_db_thr_event_enable,
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.to_thr_event_getmsg = libthr_db_thr_event_getmsg,
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.to_thr_get_info = libthr_db_thr_get_info,
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.to_thr_getfpregs = libthr_db_thr_getfpregs,
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.to_thr_getgregs = libthr_db_thr_getgregs,
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.to_thr_set_event = libthr_db_thr_set_event,
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.to_thr_setfpregs = libthr_db_thr_setfpregs,
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.to_thr_setgregs = libthr_db_thr_setgregs,
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.to_thr_validate = libthr_db_thr_validate,
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/* FreeBSD specific extensions. */
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.to_thr_sstep = libthr_db_sstep
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};
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