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)
204 TAILQ_HEAD(, pthread) thread_list;
213 ret = ps_pread(ta->ph, ta->thread_list_addr, &thread_list,
214 sizeof(thread_list));
217 /* Iterate through thread list to find pthread */
218 pt = (psaddr_t)thread_list.tqh_first;
220 ret = ps_pread(ta->ph, pt + ta->thread_off_tid,
226 /* get next thread */
227 ret = ps_pread(ta->ph,
228 pt + ta->thread_off_next,
242 pt_ta_map_lwp2thr(const td_thragent_t *ta, lwpid_t lwp, td_thrhandle_t *th)
244 return (pt_ta_map_id2thr(ta, lwp, th));
248 pt_ta_thr_iter(const td_thragent_t *ta,
249 td_thr_iter_f *callback, void *cbdata_p,
250 td_thr_state_e state, int ti_pri,
251 sigset_t *ti_sigmask_p,
252 unsigned int ti_user_flags)
254 TAILQ_HEAD(, pthread) thread_list;
262 ret = ps_pread(ta->ph, ta->thread_list_addr, &thread_list,
263 sizeof(thread_list));
266 pt = (psaddr_t)thread_list.tqh_first;
268 ret = ps_pread(ta->ph, pt + ta->thread_off_tid, &lwp,
272 if (lwp != 0 && lwp != TERMINATED) {
274 th.th_tid = (thread_t)lwp;
276 if ((*callback)(&th, cbdata_p))
279 /* get next thread */
280 ret = ps_pread(ta->ph, pt + ta->thread_off_next, &pt,
289 pt_ta_tsd_iter(const td_thragent_t *ta, td_key_iter_f *ki, void *arg)
293 int i, ret, allocated;
297 keytable = malloc(ta->thread_max_keys * ta->thread_size_key);
298 if (keytable == NULL)
300 ret = ps_pread(ta->ph, (psaddr_t)ta->thread_keytable_addr, keytable,
301 ta->thread_max_keys * ta->thread_size_key);
306 for (i = 0; i < ta->thread_max_keys; i++) {
307 allocated = *(int *)(keytable + i * ta->thread_size_key +
308 ta->thread_off_key_allocated);
309 destructor = *(void **)(keytable + i * ta->thread_size_key +
310 ta->thread_off_key_destructor);
312 ret = (ki)(i, destructor, arg);
324 pt_ta_event_addr(const td_thragent_t *ta, td_event_e event, td_notify_t *ptr)
331 ptr->type = NOTIFY_BPT;
332 ptr->u.bptaddr = ta->thread_bp_create_addr;
335 ptr->type = NOTIFY_BPT;
336 ptr->u.bptaddr = ta->thread_bp_death_addr;
344 pt_ta_set_event(const td_thragent_t *ta, td_thr_events_t *events)
346 td_thr_events_t mask;
350 ret = ps_pread(ta->ph, ta->thread_event_mask_addr, &mask,
355 ret = ps_pwrite(ta->ph, ta->thread_event_mask_addr, &mask,
361 pt_ta_clear_event(const td_thragent_t *ta, td_thr_events_t *events)
363 td_thr_events_t mask;
367 ret = ps_pread(ta->ph, ta->thread_event_mask_addr, &mask,
372 ret = ps_pwrite(ta->ph, ta->thread_event_mask_addr, &mask,
378 pt_ta_event_getmsg(const td_thragent_t *ta, td_event_msg_t *msg)
380 static td_thrhandle_t handle;
382 psaddr_t pt, pt_temp;
389 ret = ps_pread(ta->ph, ta->thread_last_event_addr, &pt, sizeof(pt));
395 * Take the event pointer, at the time, libthr only reports event
396 * once a time, so it is not a link list.
399 ps_pwrite(ta->ph, ta->thread_last_event_addr, &pt_temp, sizeof(pt_temp));
401 /* Read event info */
402 ret = ps_pread(ta->ph, pt + ta->thread_off_event_buf, msg, sizeof(*msg));
409 ps_pwrite(ta->ph, pt + ta->thread_off_event_buf, &tmp, sizeof(tmp));
411 pt = (psaddr_t)msg->th_p;
412 ret = ps_pread(ta->ph, pt + ta->thread_off_tid, &lwp, sizeof(lwp));
417 handle.th_thread = pt;
423 pt_dbsuspend(const td_thrhandle_t *th, int suspend)
425 td_thragent_t *ta = (td_thragent_t *)th->th_ta;
430 ret = pt_validate(th);
435 ret = ps_lstop(ta->ph, th->th_tid);
437 ret = ps_lcontinue(ta->ph, th->th_tid);
442 pt_thr_dbresume(const td_thrhandle_t *th)
446 return pt_dbsuspend(th, 0);
450 pt_thr_dbsuspend(const td_thrhandle_t *th)
454 return pt_dbsuspend(th, 1);
458 pt_thr_validate(const td_thrhandle_t *th)
465 ret = pt_ta_map_id2thr(th->th_ta, th->th_tid, &temp);
470 pt_thr_get_info(const td_thrhandle_t *th, td_thrinfo_t *info)
472 const td_thragent_t *ta = th->th_ta;
478 ret = pt_validate(th);
481 ret = ps_pread(ta->ph, th->th_thread + ta->thread_off_state,
482 &state, sizeof(state));
485 ret = ps_pread(ta->ph, th->th_thread + ta->thread_off_report_events,
486 &info->ti_traceme, sizeof(int));
489 ret = ps_pread(ta->ph, th->th_thread + ta->thread_off_event_mask,
490 &info->ti_events, sizeof(td_thr_events_t));
493 ret = ps_pread(ta->ph, th->th_thread + ta->thread_off_tcb,
494 &info->ti_tls, sizeof(void *));
495 info->ti_lid = th->th_tid;
496 info->ti_tid = th->th_tid;
497 info->ti_thread = th->th_thread;
498 info->ti_ta_p = th->th_ta;
499 if (state == ta->thread_state_running)
500 info->ti_state = TD_THR_RUN;
501 else if (state == ta->thread_state_zoombie)
502 info->ti_state = TD_THR_ZOMBIE;
504 info->ti_state = TD_THR_SLEEP;
505 info->ti_type = TD_THR_USER;
510 pt_thr_getfpregs(const td_thrhandle_t *th, prfpregset_t *fpregs)
512 const td_thragent_t *ta = th->th_ta;
517 ret = pt_validate(th);
521 ret = ps_lgetfpregs(ta->ph, th->th_tid, fpregs);
526 pt_thr_getgregs(const td_thrhandle_t *th, prgregset_t gregs)
528 const td_thragent_t *ta = th->th_ta;
533 ret = pt_validate(th);
537 ret = ps_lgetregs(ta->ph, th->th_tid, gregs);
542 pt_thr_setfpregs(const td_thrhandle_t *th, const prfpregset_t *fpregs)
544 const td_thragent_t *ta = th->th_ta;
549 ret = pt_validate(th);
553 ret = ps_lsetfpregs(ta->ph, th->th_tid, fpregs);
558 pt_thr_setgregs(const td_thrhandle_t *th, const prgregset_t gregs)
560 const td_thragent_t *ta = th->th_ta;
565 ret = pt_validate(th);
569 ret = ps_lsetregs(ta->ph, th->th_tid, gregs);
574 pt_thr_event_enable(const td_thrhandle_t *th, int en)
576 const td_thragent_t *ta = th->th_ta;
580 ret = ps_pwrite(ta->ph, th->th_thread + ta->thread_off_report_events,
586 pt_thr_set_event(const td_thrhandle_t *th, td_thr_events_t *setp)
588 const td_thragent_t *ta = th->th_ta;
589 td_thr_events_t mask;
593 ret = ps_pread(ta->ph, th->th_thread + ta->thread_off_event_mask,
594 &mask, sizeof(mask));
596 ret = ps_pwrite(ta->ph, th->th_thread + ta->thread_off_event_mask,
597 &mask, sizeof(mask));
602 pt_thr_clear_event(const td_thrhandle_t *th, td_thr_events_t *setp)
604 const td_thragent_t *ta = th->th_ta;
605 td_thr_events_t mask;
609 ret = ps_pread(ta->ph, th->th_thread + ta->thread_off_event_mask,
610 &mask, sizeof(mask));
612 ret = ps_pwrite(ta->ph, th->th_thread + ta->thread_off_event_mask,
613 &mask, sizeof(mask));
618 pt_thr_event_getmsg(const td_thrhandle_t *th, td_event_msg_t *msg)
620 static td_thrhandle_t handle;
621 td_thragent_t *ta = (td_thragent_t *)th->th_ta;
622 psaddr_t pt, pt_temp;
629 ret = ps_pread(ta->ph, ta->thread_last_event_addr, &pt_temp, sizeof(pt_temp));
633 ret = ps_pread(ta->ph, pt + ta->thread_off_event_buf, msg, sizeof(*msg));
639 * Take the event pointer, at the time, libthr only reports event
640 * once a time, so it is not a link list.
644 ps_pwrite(ta->ph, ta->thread_last_event_addr, &pt_temp, sizeof(pt_temp));
648 ps_pwrite(ta->ph, pt + ta->thread_off_event_buf, &tmp, sizeof(tmp));
650 pt = (psaddr_t)msg->th_p;
651 ret = ps_pread(ta->ph, pt + ta->thread_off_tid, &lwp, sizeof(lwp));
656 handle.th_thread = pt;
662 pt_thr_sstep(const td_thrhandle_t *th, int step)
666 return pt_validate(th);
670 pt_validate(const td_thrhandle_t *th)
673 if (th->th_tid == 0 || th->th_thread == NULL)
679 pt_thr_tls_get_addr(const td_thrhandle_t *th, void *_linkmap, size_t offset,
683 const td_thragent_t *ta = th->th_ta;
684 psaddr_t tcb_addr, *dtv_addr, tcb_tp;
687 /* linkmap is a member of Obj_Entry */
688 obj_entry = (char *)_linkmap - ta->thread_off_linkmap;
690 /* get tlsindex of the object file */
691 ret = ps_pread(ta->ph,
692 obj_entry + ta->thread_off_tlsindex,
693 &tls_index, sizeof(tls_index));
698 ret = ps_pread(ta->ph, th->th_thread + ta->thread_off_tcb,
699 &tcb_addr, sizeof(tcb_addr));
703 /* get dtv array address */
704 ret = ps_pread(ta->ph, tcb_addr + ta->thread_off_dtv,
705 &dtv_addr, sizeof(dtv_addr));
708 /* now get the object's tls block base address */
709 ret = ps_pread(ta->ph, &dtv_addr[tls_index+1], address,
718 struct ta_ops libthr_db_ops = {
720 .to_ta_clear_event = pt_ta_clear_event,
721 .to_ta_delete = pt_ta_delete,
722 .to_ta_event_addr = pt_ta_event_addr,
723 .to_ta_event_getmsg = pt_ta_event_getmsg,
724 .to_ta_map_id2thr = pt_ta_map_id2thr,
725 .to_ta_map_lwp2thr = pt_ta_map_lwp2thr,
726 .to_ta_new = pt_ta_new,
727 .to_ta_set_event = pt_ta_set_event,
728 .to_ta_thr_iter = pt_ta_thr_iter,
729 .to_ta_tsd_iter = pt_ta_tsd_iter,
730 .to_thr_clear_event = pt_thr_clear_event,
731 .to_thr_dbresume = pt_thr_dbresume,
732 .to_thr_dbsuspend = pt_thr_dbsuspend,
733 .to_thr_event_enable = pt_thr_event_enable,
734 .to_thr_event_getmsg = pt_thr_event_getmsg,
735 .to_thr_get_info = pt_thr_get_info,
736 .to_thr_getfpregs = pt_thr_getfpregs,
737 .to_thr_getgregs = pt_thr_getgregs,
738 .to_thr_set_event = pt_thr_set_event,
739 .to_thr_setfpregs = pt_thr_setfpregs,
740 .to_thr_setgregs = pt_thr_setgregs,
741 .to_thr_validate = pt_thr_validate,
742 .to_thr_tls_get_addr = pt_thr_tls_get_addr,
744 /* FreeBSD specific extensions. */
745 .to_thr_sstep = pt_thr_sstep,