2 * Copyright (c) 2004 Marcel Moolenaar
3 * Copyright (c) 2005 David Xu
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
31 #include <proc_service.h>
35 #include <sys/types.h>
36 #include <sys/ptrace.h>
37 #include <thread_db.h>
40 #include "thread_db_int.h"
46 psaddr_t libthr_debug_addr;
47 psaddr_t thread_list_addr;
48 psaddr_t thread_active_threads_addr;
49 psaddr_t thread_keytable_addr;
50 psaddr_t thread_last_event_addr;
51 psaddr_t thread_event_mask_addr;
52 psaddr_t thread_bp_create_addr;
53 psaddr_t thread_bp_death_addr;
55 int thread_off_tlsindex;
56 int thread_off_attr_flags;
59 int thread_off_linkmap;
64 int thread_off_key_allocated;
65 int thread_off_key_destructor;
66 int thread_off_report_events;
67 int thread_off_event_mask;
68 int thread_off_event_buf;
69 int thread_state_zoombie;
70 int thread_state_running;
73 #define P2T(c) ps2td(c)
75 static int pt_validate(const td_thrhandle_t *th);
92 return TD_NOLIBTHREAD;
107 pt_ta_new(struct ps_prochandle *ph, td_thragent_t **pta)
109 #define LOOKUP_SYM(proc, sym, addr) \
110 ret = ps_pglobal_lookup(proc, NULL, sym, addr); \
112 TDBG("can not find symbol: %s\n", sym); \
113 ret = TD_NOLIBTHREAD; \
117 #define LOOKUP_VAL(proc, sym, val) \
118 ret = ps_pglobal_lookup(proc, NULL, sym, &vaddr);\
120 TDBG("can not find symbol: %s\n", sym); \
121 ret = TD_NOLIBTHREAD; \
124 ret = ps_pread(proc, vaddr, val, sizeof(int)); \
126 TDBG("can not read value of %s\n", sym);\
127 ret = TD_NOLIBTHREAD; \
138 ta = malloc(sizeof(td_thragent_t));
144 LOOKUP_SYM(ph, "_libthr_debug", &ta->libthr_debug_addr);
145 LOOKUP_SYM(ph, "_thread_list", &ta->thread_list_addr);
146 LOOKUP_SYM(ph, "_thread_active_threads",&ta->thread_active_threads_addr);
147 LOOKUP_SYM(ph, "_thread_keytable", &ta->thread_keytable_addr);
148 LOOKUP_SYM(ph, "_thread_last_event", &ta->thread_last_event_addr);
149 LOOKUP_SYM(ph, "_thread_event_mask", &ta->thread_event_mask_addr);
150 LOOKUP_SYM(ph, "_thread_bp_create", &ta->thread_bp_create_addr);
151 LOOKUP_SYM(ph, "_thread_bp_death", &ta->thread_bp_death_addr);
152 LOOKUP_VAL(ph, "_thread_off_dtv", &ta->thread_off_dtv);
153 LOOKUP_VAL(ph, "_thread_off_tlsindex", &ta->thread_off_tlsindex);
154 LOOKUP_VAL(ph, "_thread_off_attr_flags", &ta->thread_off_attr_flags);
155 LOOKUP_VAL(ph, "_thread_size_key", &ta->thread_size_key);
156 LOOKUP_VAL(ph, "_thread_off_tcb", &ta->thread_off_tcb);
157 LOOKUP_VAL(ph, "_thread_off_tid", &ta->thread_off_tid);
158 LOOKUP_VAL(ph, "_thread_off_linkmap", &ta->thread_off_linkmap);
159 LOOKUP_VAL(ph, "_thread_off_next", &ta->thread_off_next);
160 LOOKUP_VAL(ph, "_thread_off_state", &ta->thread_off_state);
161 LOOKUP_VAL(ph, "_thread_max_keys", &ta->thread_max_keys);
162 LOOKUP_VAL(ph, "_thread_off_key_allocated", &ta->thread_off_key_allocated);
163 LOOKUP_VAL(ph, "_thread_off_key_destructor", &ta->thread_off_key_destructor);
164 LOOKUP_VAL(ph, "_thread_state_running", &ta->thread_state_running);
165 LOOKUP_VAL(ph, "_thread_state_zoombie", &ta->thread_state_zoombie);
166 LOOKUP_VAL(ph, "_thread_off_report_events", &ta->thread_off_report_events);
167 LOOKUP_VAL(ph, "_thread_off_event_mask", &ta->thread_off_event_mask);
168 LOOKUP_VAL(ph, "_thread_off_event_buf", &ta->thread_off_event_buf);
171 * If this fails it probably means we're debugging a core file and
174 ps_pwrite(ph, ta->libthr_debug_addr, &dbg, sizeof(int));
184 pt_ta_delete(td_thragent_t *ta)
192 * Error returns from this write are not really a problem;
193 * the process doesn't exist any more.
195 ps_pwrite(ta->ph, ta->libthr_debug_addr, &dbg, sizeof(int));
201 pt_ta_map_id2thr(const td_thragent_t *ta, thread_t id, td_thrhandle_t *th)
203 TAILQ_HEAD(, pthread) thread_list;
212 ret = ps_pread(ta->ph, ta->thread_list_addr, &thread_list,
213 sizeof(thread_list));
216 /* Iterate through thread list to find pthread */
217 pt = (psaddr_t)thread_list.tqh_first;
219 ret = ps_pread(ta->ph, pt + ta->thread_off_tid,
225 /* get next thread */
226 ret = ps_pread(ta->ph,
227 pt + ta->thread_off_next,
241 pt_ta_map_lwp2thr(const td_thragent_t *ta, lwpid_t lwp, td_thrhandle_t *th)
243 return (pt_ta_map_id2thr(ta, lwp, th));
247 pt_ta_thr_iter(const td_thragent_t *ta,
248 td_thr_iter_f *callback, void *cbdata_p,
249 td_thr_state_e state, int ti_pri,
250 sigset_t *ti_sigmask_p,
251 unsigned int ti_user_flags)
253 TAILQ_HEAD(, pthread) thread_list;
261 ret = ps_pread(ta->ph, ta->thread_list_addr, &thread_list,
262 sizeof(thread_list));
265 pt = (psaddr_t)thread_list.tqh_first;
267 ret = ps_pread(ta->ph, pt + ta->thread_off_tid, &lwp,
271 if (lwp != 0 && lwp != TERMINATED) {
273 th.th_tid = (thread_t)lwp;
275 if ((*callback)(&th, cbdata_p))
278 /* get next thread */
279 ret = ps_pread(ta->ph, pt + ta->thread_off_next, &pt,
288 pt_ta_tsd_iter(const td_thragent_t *ta, td_key_iter_f *ki, void *arg)
292 int i, ret, allocated;
296 keytable = malloc(ta->thread_max_keys * ta->thread_size_key);
297 if (keytable == NULL)
299 ret = ps_pread(ta->ph, (psaddr_t)ta->thread_keytable_addr, keytable,
300 ta->thread_max_keys * ta->thread_size_key);
305 for (i = 0; i < ta->thread_max_keys; i++) {
306 allocated = *(int *)(keytable + i * ta->thread_size_key +
307 ta->thread_off_key_allocated);
308 destructor = *(void **)(keytable + i * ta->thread_size_key +
309 ta->thread_off_key_destructor);
311 ret = (ki)(i, destructor, arg);
323 pt_ta_event_addr(const td_thragent_t *ta, td_event_e event, td_notify_t *ptr)
330 ptr->type = NOTIFY_BPT;
331 ptr->u.bptaddr = ta->thread_bp_create_addr;
334 ptr->type = NOTIFY_BPT;
335 ptr->u.bptaddr = ta->thread_bp_death_addr;
343 pt_ta_set_event(const td_thragent_t *ta, td_thr_events_t *events)
345 td_thr_events_t mask;
349 ret = ps_pread(ta->ph, ta->thread_event_mask_addr, &mask,
354 ret = ps_pwrite(ta->ph, ta->thread_event_mask_addr, &mask,
360 pt_ta_clear_event(const td_thragent_t *ta, td_thr_events_t *events)
362 td_thr_events_t mask;
366 ret = ps_pread(ta->ph, ta->thread_event_mask_addr, &mask,
371 ret = ps_pwrite(ta->ph, ta->thread_event_mask_addr, &mask,
377 pt_ta_event_getmsg(const td_thragent_t *ta, td_event_msg_t *msg)
379 static td_thrhandle_t handle;
381 psaddr_t pt, pt_temp;
388 ret = ps_pread(ta->ph, ta->thread_last_event_addr, &pt, sizeof(pt));
394 * Take the event pointer, at the time, libthr only reports event
395 * once a time, so it is not a link list.
398 ps_pwrite(ta->ph, ta->thread_last_event_addr, &pt_temp, sizeof(pt_temp));
400 /* Read event info */
401 ret = ps_pread(ta->ph, pt + ta->thread_off_event_buf, msg, sizeof(*msg));
408 ps_pwrite(ta->ph, pt + ta->thread_off_event_buf, &tmp, sizeof(tmp));
410 pt = (psaddr_t)msg->th_p;
411 ret = ps_pread(ta->ph, pt + ta->thread_off_tid, &lwp, sizeof(lwp));
416 handle.th_thread = pt;
422 pt_dbsuspend(const td_thrhandle_t *th, int suspend)
424 td_thragent_t *ta = (td_thragent_t *)th->th_ta;
429 ret = pt_validate(th);
434 ret = ps_lstop(ta->ph, th->th_tid);
436 ret = ps_lcontinue(ta->ph, th->th_tid);
441 pt_thr_dbresume(const td_thrhandle_t *th)
445 return pt_dbsuspend(th, 0);
449 pt_thr_dbsuspend(const td_thrhandle_t *th)
453 return pt_dbsuspend(th, 1);
457 pt_thr_validate(const td_thrhandle_t *th)
464 ret = pt_ta_map_id2thr(th->th_ta, th->th_tid, &temp);
469 pt_thr_get_info(const td_thrhandle_t *th, td_thrinfo_t *info)
471 const td_thragent_t *ta = th->th_ta;
472 struct ptrace_lwpinfo linfo;
478 bzero(info, sizeof(*info));
479 ret = pt_validate(th);
482 ret = ps_pread(ta->ph, th->th_thread + ta->thread_off_state,
483 &state, sizeof(state));
486 ret = ps_pread(ta->ph, th->th_thread + ta->thread_off_report_events,
487 &info->ti_traceme, sizeof(int));
490 ret = ps_pread(ta->ph, th->th_thread + ta->thread_off_event_mask,
491 &info->ti_events, sizeof(td_thr_events_t));
494 ret = ps_pread(ta->ph, th->th_thread + ta->thread_off_tcb,
495 &info->ti_tls, sizeof(void *));
496 info->ti_lid = th->th_tid;
497 info->ti_tid = th->th_tid;
498 info->ti_thread = th->th_thread;
499 info->ti_ta_p = th->th_ta;
500 ret = ps_linfo(ta->ph, th->th_tid, &linfo);
502 info->ti_sigmask = linfo.pl_sigmask;
503 info->ti_pending = linfo.pl_siglist;
506 if (state == ta->thread_state_running)
507 info->ti_state = TD_THR_RUN;
508 else if (state == ta->thread_state_zoombie)
509 info->ti_state = TD_THR_ZOMBIE;
511 info->ti_state = TD_THR_SLEEP;
512 info->ti_type = TD_THR_USER;
518 pt_thr_getxmmregs(const td_thrhandle_t *th, char *fxsave)
520 const td_thragent_t *ta = th->th_ta;
525 ret = pt_validate(th);
529 ret = ps_lgetxmmregs(ta->ph, th->th_tid, fxsave);
535 pt_thr_getfpregs(const td_thrhandle_t *th, prfpregset_t *fpregs)
537 const td_thragent_t *ta = th->th_ta;
542 ret = pt_validate(th);
546 ret = ps_lgetfpregs(ta->ph, th->th_tid, fpregs);
551 pt_thr_getgregs(const td_thrhandle_t *th, prgregset_t gregs)
553 const td_thragent_t *ta = th->th_ta;
558 ret = pt_validate(th);
562 ret = ps_lgetregs(ta->ph, th->th_tid, gregs);
568 pt_thr_setxmmregs(const td_thrhandle_t *th, const char *fxsave)
570 const td_thragent_t *ta = th->th_ta;
575 ret = pt_validate(th);
579 ret = ps_lsetxmmregs(ta->ph, th->th_tid, fxsave);
585 pt_thr_setfpregs(const td_thrhandle_t *th, const prfpregset_t *fpregs)
587 const td_thragent_t *ta = th->th_ta;
592 ret = pt_validate(th);
596 ret = ps_lsetfpregs(ta->ph, th->th_tid, fpregs);
601 pt_thr_setgregs(const td_thrhandle_t *th, const prgregset_t gregs)
603 const td_thragent_t *ta = th->th_ta;
608 ret = pt_validate(th);
612 ret = ps_lsetregs(ta->ph, th->th_tid, gregs);
617 pt_thr_event_enable(const td_thrhandle_t *th, int en)
619 const td_thragent_t *ta = th->th_ta;
623 ret = ps_pwrite(ta->ph, th->th_thread + ta->thread_off_report_events,
629 pt_thr_set_event(const td_thrhandle_t *th, td_thr_events_t *setp)
631 const td_thragent_t *ta = th->th_ta;
632 td_thr_events_t mask;
636 ret = ps_pread(ta->ph, th->th_thread + ta->thread_off_event_mask,
637 &mask, sizeof(mask));
639 ret = ps_pwrite(ta->ph, th->th_thread + ta->thread_off_event_mask,
640 &mask, sizeof(mask));
645 pt_thr_clear_event(const td_thrhandle_t *th, td_thr_events_t *setp)
647 const td_thragent_t *ta = th->th_ta;
648 td_thr_events_t mask;
652 ret = ps_pread(ta->ph, th->th_thread + ta->thread_off_event_mask,
653 &mask, sizeof(mask));
655 ret = ps_pwrite(ta->ph, th->th_thread + ta->thread_off_event_mask,
656 &mask, sizeof(mask));
661 pt_thr_event_getmsg(const td_thrhandle_t *th, td_event_msg_t *msg)
663 static td_thrhandle_t handle;
664 td_thragent_t *ta = (td_thragent_t *)th->th_ta;
665 psaddr_t pt, pt_temp;
672 ret = ps_pread(ta->ph, ta->thread_last_event_addr, &pt_temp, sizeof(pt_temp));
676 ret = ps_pread(ta->ph, pt + ta->thread_off_event_buf, msg, sizeof(*msg));
682 * Take the event pointer, at the time, libthr only reports event
683 * once a time, so it is not a link list.
687 ps_pwrite(ta->ph, ta->thread_last_event_addr, &pt_temp, sizeof(pt_temp));
691 ps_pwrite(ta->ph, pt + ta->thread_off_event_buf, &tmp, sizeof(tmp));
693 pt = (psaddr_t)msg->th_p;
694 ret = ps_pread(ta->ph, pt + ta->thread_off_tid, &lwp, sizeof(lwp));
699 handle.th_thread = pt;
705 pt_thr_sstep(const td_thrhandle_t *th, int step)
709 return pt_validate(th);
713 pt_validate(const td_thrhandle_t *th)
716 if (th->th_tid == 0 || th->th_thread == NULL)
722 pt_thr_tls_get_addr(const td_thrhandle_t *th, void *_linkmap, size_t offset,
726 const td_thragent_t *ta = th->th_ta;
727 psaddr_t tcb_addr, *dtv_addr;
730 /* linkmap is a member of Obj_Entry */
731 obj_entry = (char *)_linkmap - ta->thread_off_linkmap;
733 /* get tlsindex of the object file */
734 ret = ps_pread(ta->ph,
735 obj_entry + ta->thread_off_tlsindex,
736 &tls_index, sizeof(tls_index));
741 ret = ps_pread(ta->ph, th->th_thread + ta->thread_off_tcb,
742 &tcb_addr, sizeof(tcb_addr));
746 /* get dtv array address */
747 ret = ps_pread(ta->ph, tcb_addr + ta->thread_off_dtv,
748 &dtv_addr, sizeof(dtv_addr));
751 /* now get the object's tls block base address */
752 ret = ps_pread(ta->ph, &dtv_addr[tls_index+1], address,
761 struct ta_ops libthr_db_ops = {
763 .to_ta_clear_event = pt_ta_clear_event,
764 .to_ta_delete = pt_ta_delete,
765 .to_ta_event_addr = pt_ta_event_addr,
766 .to_ta_event_getmsg = pt_ta_event_getmsg,
767 .to_ta_map_id2thr = pt_ta_map_id2thr,
768 .to_ta_map_lwp2thr = pt_ta_map_lwp2thr,
769 .to_ta_new = pt_ta_new,
770 .to_ta_set_event = pt_ta_set_event,
771 .to_ta_thr_iter = pt_ta_thr_iter,
772 .to_ta_tsd_iter = pt_ta_tsd_iter,
773 .to_thr_clear_event = pt_thr_clear_event,
774 .to_thr_dbresume = pt_thr_dbresume,
775 .to_thr_dbsuspend = pt_thr_dbsuspend,
776 .to_thr_event_enable = pt_thr_event_enable,
777 .to_thr_event_getmsg = pt_thr_event_getmsg,
778 .to_thr_get_info = pt_thr_get_info,
779 .to_thr_getfpregs = pt_thr_getfpregs,
780 .to_thr_getgregs = pt_thr_getgregs,
781 .to_thr_set_event = pt_thr_set_event,
782 .to_thr_setfpregs = pt_thr_setfpregs,
783 .to_thr_setgregs = pt_thr_setgregs,
784 .to_thr_validate = pt_thr_validate,
785 .to_thr_tls_get_addr = pt_thr_tls_get_addr,
787 /* FreeBSD specific extensions. */
788 .to_thr_sstep = pt_thr_sstep,
790 .to_thr_getxmmregs = pt_thr_getxmmregs,
791 .to_thr_setxmmregs = pt_thr_setxmmregs,