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.
27 * $DragonFly: src/lib/libthread_db/libthread_xu.c,v 1.3 2005/05/07 10:08:08 davidxu Exp $
30 #include <sys/cdefs.h>
32 #include <proc_service.h>
36 #include <machine/tls.h>
37 #include <sys/types.h>
38 #include <sys/ptrace.h>
40 #include <thread_db.h>
43 #include "thread_db_int.h"
49 psaddr_t libthread_xu_debug_addr;
50 psaddr_t thread_active_threads_addr;
51 psaddr_t thread_bp_create_addr;
52 psaddr_t thread_bp_death_addr;
53 psaddr_t thread_event_mask_addr;
54 psaddr_t thread_keytable_addr;
55 psaddr_t thread_last_event_addr;
56 psaddr_t thread_list_addr;
58 int thread_off_attr_flags;
60 int thread_off_event_buf;
61 int thread_off_event_mask;
62 int thread_off_key_allocated;
63 int thread_off_key_destructor;
64 int thread_off_linkmap;
66 int thread_off_report_events;
70 int thread_off_tlsindex;
72 int thread_state_running;
73 int thread_state_zoombie;
76 #define P2T(c) ps2td(c)
78 static int pt_validate(const td_thrhandle_t *th);
95 return TD_NOLIBTHREAD;
110 pt_ta_new(struct ps_prochandle *ph, td_thragent_t **pta)
112 #define LOOKUP_SYM(proc, sym, addr) \
113 ret = ps_pglobal_lookup(proc, NULL, sym, addr); \
115 TDBG("can not find symbol: %s\n", sym); \
116 ret = TD_NOLIBTHREAD; \
120 #define LOOKUP_VAL(proc, sym, val) \
121 ret = ps_pglobal_lookup(proc, NULL, sym, &vaddr);\
123 TDBG("can not find symbol: %s\n", sym); \
124 ret = TD_NOLIBTHREAD; \
127 ret = ps_pread(proc, vaddr, val, sizeof(int)); \
129 TDBG("can not read value of %s\n", sym);\
130 ret = TD_NOLIBTHREAD; \
141 ta = malloc(sizeof(td_thragent_t));
147 LOOKUP_SYM(ph, "_libthread_xu_debug", &ta->libthread_xu_debug_addr);
148 LOOKUP_SYM(ph, "_thread_active_threads",&ta->thread_active_threads_addr);
149 LOOKUP_SYM(ph, "_thread_bp_create", &ta->thread_bp_create_addr);
150 LOOKUP_SYM(ph, "_thread_bp_death", &ta->thread_bp_death_addr);
151 LOOKUP_SYM(ph, "_thread_event_mask", &ta->thread_event_mask_addr);
152 LOOKUP_SYM(ph, "_thread_keytable", &ta->thread_keytable_addr);
153 LOOKUP_SYM(ph, "_thread_last_event", &ta->thread_last_event_addr);
154 LOOKUP_SYM(ph, "_thread_list", &ta->thread_list_addr);
155 LOOKUP_VAL(ph, "_thread_max_keys", &ta->thread_max_keys);
156 LOOKUP_VAL(ph, "_thread_off_attr_flags", &ta->thread_off_attr_flags);
157 LOOKUP_VAL(ph, "_thread_off_event_buf", &ta->thread_off_event_buf);
158 LOOKUP_VAL(ph, "_thread_off_event_mask", &ta->thread_off_event_mask);
159 LOOKUP_VAL(ph, "_thread_off_key_allocated", &ta->thread_off_key_allocated);
160 LOOKUP_VAL(ph, "_thread_off_key_destructor", &ta->thread_off_key_destructor);
161 LOOKUP_VAL(ph, "_thread_off_next", &ta->thread_off_next);
162 LOOKUP_VAL(ph, "_thread_off_report_events", &ta->thread_off_report_events);
163 LOOKUP_VAL(ph, "_thread_off_state", &ta->thread_off_state);
164 LOOKUP_VAL(ph, "_thread_off_tcb", &ta->thread_off_tcb);
165 LOOKUP_VAL(ph, "_thread_off_tid", &ta->thread_off_tid);
166 LOOKUP_VAL(ph, "_thread_size_key", &ta->thread_size_key);
167 LOOKUP_VAL(ph, "_thread_state_running", &ta->thread_state_running);
168 LOOKUP_VAL(ph, "_thread_state_zoombie", &ta->thread_state_zoombie);
170 ta->thread_off_linkmap = offsetof(Obj_Entry, linkmap);
171 ta->thread_off_tlsindex = offsetof(Obj_Entry, tlsindex);
172 ta->thread_off_dtv = offsetof(struct tls_tcb, tcb_dtv);
176 * If this fails it probably means we're debugging a core file and
179 ps_pwrite(ph, ta->libthread_xu_debug_addr, &dbg, sizeof(int));
189 pt_ta_delete(td_thragent_t *ta)
197 * Error returns from this write are not really a problem;
198 * the process doesn't exist any more.
200 ps_pwrite(ta->ph, ta->libthread_xu_debug_addr, &dbg, sizeof(int));
206 pt_ta_map_id2thr(const td_thragent_t *ta, thread_t id, td_thrhandle_t *th)
209 TAILQ_HEAD(, pthread) thread_list;
218 ret = ps_pread(ta->ph, ta->thread_list_addr, &thread_list,
219 sizeof(thread_list));
222 /* Iterate through thread list to find pthread */
223 pt = (psaddr_t)thread_list.tqh_first;
225 ret = ps_pread(ta->ph, pt + ta->thread_off_tid,
231 /* get next thread */
232 ret = ps_pread(ta->ph,
233 pt + ta->thread_off_next,
247 pt_ta_map_lwp2thr(const td_thragent_t *ta, lwpid_t lwp, td_thrhandle_t *th)
249 return (pt_ta_map_id2thr(ta, lwp, th));
253 pt_ta_thr_iter(const td_thragent_t *ta,
254 td_thr_iter_f *callback, void *cbdata_p,
255 td_thr_state_e state, int ti_pri,
256 sigset_t *ti_sigmask_p,
257 unsigned int ti_user_flags)
259 TAILQ_HEAD(, pthread) thread_list;
267 ret = ps_pread(ta->ph, ta->thread_list_addr, &thread_list,
268 sizeof(thread_list));
271 pt = (psaddr_t)thread_list.tqh_first;
273 ret = ps_pread(ta->ph, pt + ta->thread_off_tid, &lwp,
277 if (lwp != 0 && lwp != TERMINATED) {
279 th.th_tid = (thread_t)lwp;
281 if ((*callback)(&th, cbdata_p))
284 /* get next thread */
285 ret = ps_pread(ta->ph, pt + ta->thread_off_next, &pt,
294 pt_ta_tsd_iter(const td_thragent_t *ta, td_key_iter_f *ki, void *arg)
298 int i, ret, allocated;
302 keytable = malloc(ta->thread_max_keys * ta->thread_size_key);
303 if (keytable == NULL)
305 ret = ps_pread(ta->ph, (psaddr_t)ta->thread_keytable_addr, keytable,
306 ta->thread_max_keys * ta->thread_size_key);
311 for (i = 0; i < ta->thread_max_keys; i++) {
312 allocated = *(int *)(keytable + i * ta->thread_size_key +
313 ta->thread_off_key_allocated);
314 destructor = *(void **)(keytable + i * ta->thread_size_key +
315 ta->thread_off_key_destructor);
317 ret = (ki)(i, destructor, arg);
329 pt_ta_event_addr(const td_thragent_t *ta, td_event_e event, td_notify_t *ptr)
336 ptr->type = NOTIFY_BPT;
337 ptr->u.bptaddr = ta->thread_bp_create_addr;
340 ptr->type = NOTIFY_BPT;
341 ptr->u.bptaddr = ta->thread_bp_death_addr;
349 pt_ta_set_event(const td_thragent_t *ta, td_thr_events_t *events)
351 td_thr_events_t mask;
355 ret = ps_pread(ta->ph, ta->thread_event_mask_addr, &mask,
360 ret = ps_pwrite(ta->ph, ta->thread_event_mask_addr, &mask,
366 pt_ta_clear_event(const td_thragent_t *ta, td_thr_events_t *events)
368 td_thr_events_t mask;
372 ret = ps_pread(ta->ph, ta->thread_event_mask_addr, &mask,
377 ret = ps_pwrite(ta->ph, ta->thread_event_mask_addr, &mask,
383 pt_ta_event_getmsg(const td_thragent_t *ta, td_event_msg_t *msg)
385 static td_thrhandle_t handle;
387 psaddr_t pt, pt_temp;
394 ret = ps_pread(ta->ph, ta->thread_last_event_addr, &pt, sizeof(pt));
400 * Take the event pointer, at the time, libthr only reports event
401 * once a time, so it is not a link list.
404 ps_pwrite(ta->ph, ta->thread_last_event_addr, &pt_temp, sizeof(pt_temp));
406 /* Read event info */
407 ret = ps_pread(ta->ph, pt + ta->thread_off_event_buf, msg, sizeof(*msg));
414 ps_pwrite(ta->ph, pt + ta->thread_off_event_buf, &tmp, sizeof(tmp));
416 pt = (psaddr_t)msg->th_p;
417 ret = ps_pread(ta->ph, pt + ta->thread_off_tid, &lwp, sizeof(lwp));
422 handle.th_thread = pt;
428 pt_dbsuspend(const td_thrhandle_t *th, int suspend)
430 td_thragent_t *ta = (td_thragent_t *)th->th_ta;
435 ret = pt_validate(th);
440 ret = ps_lstop(ta->ph, th->th_tid);
442 ret = ps_lcontinue(ta->ph, th->th_tid);
447 pt_thr_dbresume(const td_thrhandle_t *th)
451 return pt_dbsuspend(th, 0);
455 pt_thr_dbsuspend(const td_thrhandle_t *th)
459 return pt_dbsuspend(th, 1);
463 pt_thr_validate(const td_thrhandle_t *th)
470 ret = pt_ta_map_id2thr(th->th_ta, th->th_tid, &temp);
475 pt_thr_get_info(const td_thrhandle_t *th, td_thrinfo_t *info)
477 const td_thragent_t *ta = th->th_ta;
483 ret = pt_validate(th);
486 ret = ps_pread(ta->ph, th->th_thread + ta->thread_off_state,
487 &state, sizeof(state));
490 ret = ps_pread(ta->ph, th->th_thread + ta->thread_off_report_events,
491 &info->ti_traceme, sizeof(int));
494 ret = ps_pread(ta->ph, th->th_thread + ta->thread_off_event_mask,
495 &info->ti_events, sizeof(td_thr_events_t));
498 ret = ps_pread(ta->ph, th->th_thread + ta->thread_off_tcb,
499 &info->ti_tls, sizeof(void *));
500 info->ti_lid = th->th_tid;
501 info->ti_tid = th->th_tid;
502 info->ti_thread = th->th_thread;
503 info->ti_ta_p = th->th_ta;
504 if (state == ta->thread_state_running)
505 info->ti_state = TD_THR_RUN;
506 else if (state == ta->thread_state_zoombie)
507 info->ti_state = TD_THR_ZOMBIE;
509 info->ti_state = TD_THR_SLEEP;
510 info->ti_type = TD_THR_USER;
515 pt_thr_getfpregs(const td_thrhandle_t *th, prfpregset_t *fpregs)
517 const td_thragent_t *ta = th->th_ta;
522 ret = pt_validate(th);
526 ret = ps_lgetfpregs(ta->ph, th->th_tid, fpregs);
531 pt_thr_getgregs(const td_thrhandle_t *th, prgregset_t gregs)
533 const td_thragent_t *ta = th->th_ta;
538 ret = pt_validate(th);
542 ret = ps_lgetregs(ta->ph, th->th_tid, gregs);
547 pt_thr_setfpregs(const td_thrhandle_t *th, const prfpregset_t *fpregs)
549 const td_thragent_t *ta = th->th_ta;
554 ret = pt_validate(th);
558 ret = ps_lsetfpregs(ta->ph, th->th_tid, fpregs);
563 pt_thr_setgregs(const td_thrhandle_t *th, const prgregset_t gregs)
565 const td_thragent_t *ta = th->th_ta;
570 ret = pt_validate(th);
574 ret = ps_lsetregs(ta->ph, th->th_tid, gregs);
579 pt_thr_event_enable(const td_thrhandle_t *th, int en)
581 const td_thragent_t *ta = th->th_ta;
585 ret = ps_pwrite(ta->ph, th->th_thread + ta->thread_off_report_events,
591 pt_thr_set_event(const td_thrhandle_t *th, td_thr_events_t *setp)
593 const td_thragent_t *ta = th->th_ta;
594 td_thr_events_t mask;
598 ret = ps_pread(ta->ph, th->th_thread + ta->thread_off_event_mask,
599 &mask, sizeof(mask));
601 ret = ps_pwrite(ta->ph, th->th_thread + ta->thread_off_event_mask,
602 &mask, sizeof(mask));
607 pt_thr_clear_event(const td_thrhandle_t *th, td_thr_events_t *setp)
609 const td_thragent_t *ta = th->th_ta;
610 td_thr_events_t mask;
614 ret = ps_pread(ta->ph, th->th_thread + ta->thread_off_event_mask,
615 &mask, sizeof(mask));
617 ret = ps_pwrite(ta->ph, th->th_thread + ta->thread_off_event_mask,
618 &mask, sizeof(mask));
623 pt_thr_event_getmsg(const td_thrhandle_t *th, td_event_msg_t *msg)
625 static td_thrhandle_t handle;
626 td_thragent_t *ta = (td_thragent_t *)th->th_ta;
627 psaddr_t pt, pt_temp;
634 ret = ps_pread(ta->ph, ta->thread_last_event_addr, &pt_temp, sizeof(pt_temp));
638 ret = ps_pread(ta->ph, pt + ta->thread_off_event_buf, msg, sizeof(*msg));
644 * Take the event pointer, at the time, libthr only reports event
645 * once a time, so it is not a link list.
649 ps_pwrite(ta->ph, ta->thread_last_event_addr, &pt_temp, sizeof(pt_temp));
653 ps_pwrite(ta->ph, pt + ta->thread_off_event_buf, &tmp, sizeof(tmp));
655 pt = (psaddr_t)msg->th_p;
656 ret = ps_pread(ta->ph, pt + ta->thread_off_tid, &lwp, sizeof(lwp));
661 handle.th_thread = pt;
667 pt_validate(const td_thrhandle_t *th)
670 if (th->th_tid == 0 || th->th_thread == NULL)
676 pt_thr_tls_get_addr(const td_thrhandle_t *th, void *_linkmap, size_t offset,
680 const td_thragent_t *ta = th->th_ta;
681 psaddr_t tcb_addr, *dtv_addr, tcb_tp;
684 /* linkmap is a member of Obj_Entry */
685 obj_entry = (char *)_linkmap - ta->thread_off_linkmap;
687 /* get tlsindex of the object file */
688 ret = ps_pread(ta->ph,
689 obj_entry + ta->thread_off_tlsindex,
690 &tls_index, sizeof(tls_index));
695 ret = ps_pread(ta->ph, th->th_thread + ta->thread_off_tcb,
696 &tcb_addr, sizeof(tcb_addr));
700 /* get dtv array address */
701 ret = ps_pread(ta->ph, tcb_addr + ta->thread_off_dtv,
702 &dtv_addr, sizeof(dtv_addr));
705 /* now get the object's tls block base address */
706 ret = ps_pread(ta->ph, &dtv_addr[tls_index+1], address,
715 struct ta_ops libthread_xu_ops = {
717 .to_ta_clear_event = pt_ta_clear_event,
718 .to_ta_delete = pt_ta_delete,
719 .to_ta_event_addr = pt_ta_event_addr,
720 .to_ta_event_getmsg = pt_ta_event_getmsg,
721 .to_ta_map_id2thr = pt_ta_map_id2thr,
722 .to_ta_map_lwp2thr = pt_ta_map_lwp2thr,
723 .to_ta_new = pt_ta_new,
724 .to_ta_set_event = pt_ta_set_event,
725 .to_ta_thr_iter = pt_ta_thr_iter,
726 .to_ta_tsd_iter = pt_ta_tsd_iter,
727 .to_thr_clear_event = pt_thr_clear_event,
728 .to_thr_dbresume = pt_thr_dbresume,
729 .to_thr_dbsuspend = pt_thr_dbsuspend,
730 .to_thr_event_enable = pt_thr_event_enable,
731 .to_thr_event_getmsg = pt_thr_event_getmsg,
732 .to_thr_get_info = pt_thr_get_info,
733 .to_thr_getfpregs = pt_thr_getfpregs,
734 .to_thr_getgregs = pt_thr_getgregs,
735 .to_thr_set_event = pt_thr_set_event,
736 .to_thr_setfpregs = pt_thr_setfpregs,
737 .to_thr_setgregs = pt_thr_setgregs,
738 .to_thr_validate = pt_thr_validate,
739 .to_thr_tls_get_addr = pt_thr_tls_get_addr,