2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2004 David Xu <davidxu@freebsd.org>
7 * Redistribution and use in source and binary forms, with or without
8 * 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 AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
37 #include <sys/types.h>
38 #include <sys/linker_set.h>
39 #include <sys/ptrace.h>
40 #include <proc_service.h>
41 #include <thread_db.h>
43 #include "libpthread_db.h"
46 #define P2T(c) ps2td(c)
48 static void pt_unmap_lwp(const td_thragent_t *ta, lwpid_t lwp);
49 static int pt_validate(const td_thrhandle_t *th);
66 return TD_NOLIBTHREAD;
75 pt_map_thread(const td_thragent_t *const_ta, psaddr_t pt, enum pt_type type)
77 td_thragent_t *ta = __DECONST(td_thragent_t *, const_ta);
83 for (i = 1; i < ta->map_len; ++i) {
84 if (ta->map[i].type == PT_NONE) {
87 } else if (ta->map[i].type == type && ta->map[i].thr == pt) {
93 if (ta->map_len == 0) {
94 ta->map = calloc(20, sizeof(struct pt_map));
100 new = reallocarray(ta->map, ta->map_len,
101 2 * sizeof(struct pt_map));
104 memset(new + ta->map_len, '\0', ta->map_len *
105 sizeof(struct pt_map));
112 ta->map[first].type = type;
113 ta->map[first].thr = pt;
125 pt_ta_new(struct ps_prochandle *ph, td_thragent_t **pta)
127 #define LOOKUP_SYM(proc, sym, addr) \
128 ret = ps_pglobal_lookup(proc, NULL, sym, addr); \
130 TDBG("can not find symbol: %s\n", sym); \
131 ret = TD_NOLIBTHREAD; \
135 #define LOOKUP_VAL(proc, sym, val) \
136 ret = ps_pglobal_lookup(proc, NULL, sym, &vaddr);\
138 TDBG("can not find symbol: %s\n", sym); \
139 ret = TD_NOLIBTHREAD; \
142 ret = ps_pread(proc, vaddr, val, sizeof(int)); \
144 TDBG("can not read value of %s\n", sym);\
145 ret = TD_NOLIBTHREAD; \
156 ta = malloc(sizeof(td_thragent_t));
161 ta->thread_activated = 0;
165 LOOKUP_SYM(ph, "_libkse_debug", &ta->libkse_debug_addr);
166 LOOKUP_SYM(ph, "_thread_list", &ta->thread_list_addr);
167 LOOKUP_SYM(ph, "_thread_activated", &ta->thread_activated_addr);
168 LOOKUP_SYM(ph, "_thread_active_threads",&ta->thread_active_threads_addr);
169 LOOKUP_SYM(ph, "_thread_keytable", &ta->thread_keytable_addr);
170 LOOKUP_VAL(ph, "_thread_off_dtv", &ta->thread_off_dtv);
171 LOOKUP_VAL(ph, "_thread_off_kse_locklevel", &ta->thread_off_kse_locklevel);
172 LOOKUP_VAL(ph, "_thread_off_kse", &ta->thread_off_kse);
173 LOOKUP_VAL(ph, "_thread_off_tlsindex", &ta->thread_off_tlsindex);
174 LOOKUP_VAL(ph, "_thread_off_attr_flags", &ta->thread_off_attr_flags);
175 LOOKUP_VAL(ph, "_thread_size_key", &ta->thread_size_key);
176 LOOKUP_VAL(ph, "_thread_off_tcb", &ta->thread_off_tcb);
177 LOOKUP_VAL(ph, "_thread_off_linkmap", &ta->thread_off_linkmap);
178 LOOKUP_VAL(ph, "_thread_off_tmbx", &ta->thread_off_tmbx);
179 LOOKUP_VAL(ph, "_thread_off_thr_locklevel", &ta->thread_off_thr_locklevel);
180 LOOKUP_VAL(ph, "_thread_off_next", &ta->thread_off_next);
181 LOOKUP_VAL(ph, "_thread_off_state", &ta->thread_off_state);
182 LOOKUP_VAL(ph, "_thread_max_keys", &ta->thread_max_keys);
183 LOOKUP_VAL(ph, "_thread_off_key_allocated", &ta->thread_off_key_allocated);
184 LOOKUP_VAL(ph, "_thread_off_key_destructor", &ta->thread_off_key_destructor);
185 LOOKUP_VAL(ph, "_thread_state_running", &ta->thread_state_running);
186 LOOKUP_VAL(ph, "_thread_state_zoombie", &ta->thread_state_zoombie);
187 LOOKUP_VAL(ph, "_thread_off_sigmask", &ta->thread_off_sigmask);
188 LOOKUP_VAL(ph, "_thread_off_sigpend", &ta->thread_off_sigpend);
191 * If this fails it probably means we're debugging a core file and
194 ps_pwrite(ph, ta->libkse_debug_addr, &dbg, sizeof(int));
204 pt_ta_delete(td_thragent_t *ta)
212 * Error returns from this write are not really a problem;
213 * the process doesn't exist any more.
215 ps_pwrite(ta->ph, ta->libkse_debug_addr, &dbg, sizeof(int));
223 pt_ta_map_id2thr(const td_thragent_t *ta, thread_t id, td_thrhandle_t *th)
226 psaddr_t pt, tcb_addr;
232 if (id < 0 || id >= (long)ta->map_len || ta->map[id].type == PT_NONE)
235 ret = thr_pread_ptr(ta, ta->thread_list_addr, &pt);
238 if (ta->map[id].type == PT_LWP) {
240 * if we are referencing a lwp, make sure it was not already
241 * mapped to user thread.
244 ret = thr_pread_ptr(ta, pt + ta->thread_off_tcb,
248 ret = thr_pread_int(ta, tcb_addr + ta->thread_off_tmbx +
249 offsetof(struct kse_thr_mailbox, tm_lwp), &lwp);
253 * If the lwp was already mapped to userland thread,
254 * we shouldn't reference it directly in future.
256 if (lwp == ta->map[id].lwp) {
257 ta->map[id].type = PT_NONE;
260 /* get next thread */
261 ret = thr_pread_ptr(ta, pt + ta->thread_off_next, &pt);
266 ret = ps_lgetregs(ta->ph, ta->map[id].lwp, gregs);
268 /* no longer exists */
269 ta->map[id].type = PT_NONE;
273 while (pt != 0 && ta->map[id].thr != pt) {
274 ret = thr_pread_ptr(ta, pt + ta->thread_off_tcb,
278 /* get next thread */
279 ret = thr_pread_ptr(ta, pt + ta->thread_off_next, &pt);
285 /* no longer exists */
286 ta->map[id].type = PT_NONE;
297 pt_ta_map_lwp2thr(const td_thragent_t *ta, lwpid_t lwp, td_thrhandle_t *th)
299 psaddr_t pt, tcb_addr;
305 ret = thr_pread_ptr(ta, ta->thread_list_addr, &pt);
309 ret = thr_pread_ptr(ta, pt + ta->thread_off_tcb, &tcb_addr);
312 ret = thr_pread_int(ta, tcb_addr + ta->thread_off_tmbx +
313 offsetof(struct kse_thr_mailbox, tm_lwp), &lwp1);
318 th->th_tid = pt_map_thread(ta, pt, PT_USER);
319 if (th->th_tid == -1)
321 pt_unmap_lwp(ta, lwp);
326 /* get next thread */
327 ret = thr_pread_ptr(ta, pt + ta->thread_off_next, &pt);
336 pt_ta_thr_iter(const td_thragent_t *ta, td_thr_iter_f *callback,
337 void *cbdata_p, td_thr_state_e state __unused, int ti_pri __unused,
338 sigset_t *ti_sigmask_p __unused, unsigned int ti_user_flags __unused)
347 pserr = ps_pread(ta->ph, ta->thread_activated_addr, &activated,
354 ret = thr_pread_ptr(ta, ta->thread_list_addr, &pt);
359 th.th_tid = pt_map_thread(ta, pt, PT_USER);
361 /* should we unmap lwp here ? */
364 if ((*callback)(&th, cbdata_p))
366 /* get next thread */
367 ret = thr_pread_ptr(ta, pt + ta->thread_off_next, &pt);
375 pt_ta_tsd_iter(const td_thragent_t *ta, td_key_iter_f *ki, void *arg)
379 int i, ret, allocated;
383 keytable = malloc(ta->thread_max_keys * ta->thread_size_key);
384 if (keytable == NULL)
386 ret = ps_pread(ta->ph, (psaddr_t)ta->thread_keytable_addr, keytable,
387 ta->thread_max_keys * ta->thread_size_key);
392 for (i = 0; i < ta->thread_max_keys; i++) {
393 allocated = *(int *)(void *)((uintptr_t)keytable +
394 i * ta->thread_size_key + ta->thread_off_key_allocated);
395 destructor = *(void **)(void *)((uintptr_t)keytable +
396 i * ta->thread_size_key + ta->thread_off_key_destructor);
398 ret = (ki)(i, destructor, arg);
410 pt_ta_event_addr(const td_thragent_t *ta __unused, td_event_e event __unused,
411 td_notify_t *ptr __unused)
418 pt_ta_set_event(const td_thragent_t *ta __unused,
419 td_thr_events_t *events __unused)
426 pt_ta_clear_event(const td_thragent_t *ta __unused,
427 td_thr_events_t *events __unused)
434 pt_ta_event_getmsg(const td_thragent_t *ta __unused,
435 td_event_msg_t *msg __unused)
442 pt_dbsuspend(const td_thrhandle_t *th, int suspend)
444 const td_thragent_t *ta = th->th_ta;
445 psaddr_t tcb_addr, tmbx_addr, ptr;
448 int attrflags, locklevel, ret;
452 ret = pt_validate(th);
456 if (ta->map[th->th_tid].type == PT_LWP) {
458 ret = ps_lstop(ta->ph, ta->map[th->th_tid].lwp);
460 ret = ps_lcontinue(ta->ph, ta->map[th->th_tid].lwp);
464 ret = ps_pread(ta->ph, ta->map[th->th_tid].thr +
465 ta->thread_off_attr_flags,
466 &attrflags, sizeof(attrflags));
469 ret = ps_pread(ta->ph, ta->map[th->th_tid].thr +
471 &tcb_addr, sizeof(tcb_addr));
474 tmbx_addr = tcb_addr + ta->thread_off_tmbx;
475 ptr = tmbx_addr + offsetof(struct kse_thr_mailbox, tm_lwp);
476 ret = ps_pread(ta->ph, ptr, &lwp, sizeof(lwpid_t));
481 /* don't suspend signal thread */
482 if (attrflags & 0x200)
484 if (attrflags & PTHREAD_SCOPE_SYSTEM) {
486 * don't suspend system scope thread if it is holding
487 * some low level locks
489 ptr = ta->map[th->th_tid].thr + ta->thread_off_kse;
490 ret = ps_pread(ta->ph, ptr, &ptr, sizeof(ptr));
493 ret = ps_pread(ta->ph, ptr + ta->thread_off_kse_locklevel,
494 &locklevel, sizeof(int));
497 if (locklevel <= 0) {
498 ptr = ta->map[th->th_tid].thr +
499 ta->thread_off_thr_locklevel;
500 ret = ps_pread(ta->ph, ptr, &locklevel,
507 ret = ps_lstop(ta->ph, lwp);
509 ret = ps_lcontinue(ta->ph, lwp);
515 struct ptrace_lwpinfo pl;
517 if (ps_linfo(ta->ph, lwp, (caddr_t)&pl))
520 if (!(pl.pl_flags & PL_FLAG_BOUND))
521 ret = ps_lstop(ta->ph, lwp);
523 ret = ps_lcontinue(ta->ph, lwp);
531 ret = ps_pread(ta->ph,
532 tmbx_addr + offsetof(struct kse_thr_mailbox, tm_dflags),
533 &dflags, sizeof(dflags));
537 dflags |= TMDF_SUSPEND;
539 dflags &= ~TMDF_SUSPEND;
540 ret = ps_pwrite(ta->ph,
541 tmbx_addr + offsetof(struct kse_thr_mailbox, tm_dflags),
542 &dflags, sizeof(dflags));
547 pt_thr_dbresume(const td_thrhandle_t *th)
551 return pt_dbsuspend(th, 0);
555 pt_thr_dbsuspend(const td_thrhandle_t *th)
559 return pt_dbsuspend(th, 1);
563 pt_thr_validate(const td_thrhandle_t *th)
570 ret = pt_ta_map_id2thr(th->th_ta, th->th_tid,
576 pt_thr_old_get_info(const td_thrhandle_t *th, td_old_thrinfo_t *info)
578 const td_thragent_t *ta = th->th_ta;
579 struct ptrace_lwpinfo linfo;
589 bzero(info, sizeof(*info));
590 ret = pt_validate(th);
594 memset(info, 0, sizeof(*info));
595 if (ta->map[th->th_tid].type == PT_LWP) {
596 info->ti_type = TD_THR_SYSTEM;
597 info->ti_lid = ta->map[th->th_tid].lwp;
598 info->ti_tid = th->th_tid;
599 info->ti_state = TD_THR_RUN;
600 info->ti_type = TD_THR_SYSTEM;
604 ret = ps_pread(ta->ph, ta->map[th->th_tid].thr +
605 ta->thread_off_attr_flags,
606 &attrflags, sizeof(attrflags));
609 ret = ps_pread(ta->ph, ta->map[th->th_tid].thr + ta->thread_off_tcb,
610 &tcb_addr, sizeof(tcb_addr));
613 ret = ps_pread(ta->ph, ta->map[th->th_tid].thr + ta->thread_off_state,
614 &state, sizeof(state));
615 ret = ps_pread(ta->ph,
616 tcb_addr + ta->thread_off_tmbx +
617 offsetof(struct kse_thr_mailbox, tm_lwp),
618 &info->ti_lid, sizeof(lwpid_t));
621 ret = ps_pread(ta->ph,
622 tcb_addr + ta->thread_off_tmbx +
623 offsetof(struct kse_thr_mailbox, tm_dflags),
624 &dflags, sizeof(dflags));
627 ret = ps_pread(ta->ph, tcb_addr + ta->thread_off_tmbx +
628 offsetof(struct kse_thr_mailbox, tm_lwp), &lwp, sizeof(lwpid_t));
631 info->ti_ta_p = th->th_ta;
632 info->ti_tid = th->th_tid;
634 if (attrflags & PTHREAD_SCOPE_SYSTEM) {
635 ret = ps_linfo(ta->ph, lwp, &linfo);
637 info->ti_sigmask = linfo.pl_sigmask;
638 info->ti_pending = linfo.pl_siglist;
642 ret = ps_pread(ta->ph,
643 ta->map[th->th_tid].thr + ta->thread_off_sigmask,
644 &info->ti_sigmask, sizeof(sigset_t));
647 ret = ps_pread(ta->ph,
648 ta->map[th->th_tid].thr + ta->thread_off_sigpend,
649 &info->ti_pending, sizeof(sigset_t));
654 if (state == ta->thread_state_running)
655 info->ti_state = TD_THR_RUN;
656 else if (state == ta->thread_state_zoombie)
657 info->ti_state = TD_THR_ZOMBIE;
659 info->ti_state = TD_THR_SLEEP;
660 info->ti_db_suspended = ((dflags & TMDF_SUSPEND) != 0);
661 info->ti_type = TD_THR_USER;
666 pt_thr_get_info(const td_thrhandle_t *th, td_thrinfo_t *info)
670 e = pt_thr_old_get_info(th, (td_old_thrinfo_t *)info);
671 bzero(&info->ti_siginfo, sizeof(info->ti_siginfo));
677 pt_thr_getxmmregs(const td_thrhandle_t *th, char *fxsave)
679 const td_thragent_t *ta = th->th_ta;
680 struct kse_thr_mailbox tmbx;
681 psaddr_t tcb_addr, tmbx_addr, ptr;
689 ret = pt_validate(th);
693 if (ta->map[th->th_tid].type == PT_LWP) {
694 ret = ps_lgetxmmregs(ta->ph, ta->map[th->th_tid].lwp, fxsave);
698 ret = ps_pread(ta->ph, ta->map[th->th_tid].thr + ta->thread_off_tcb,
699 &tcb_addr, sizeof(tcb_addr));
702 tmbx_addr = tcb_addr + ta->thread_off_tmbx;
703 ptr = tmbx_addr + offsetof(struct kse_thr_mailbox, tm_lwp);
704 ret = ps_pread(ta->ph, ptr, &lwp, sizeof(lwpid_t));
708 ret = ps_lgetxmmregs(ta->ph, lwp, fxsave);
712 ret = ps_pread(ta->ph, tmbx_addr, &tmbx, sizeof(tmbx));
715 pt_ucontext_to_fxsave(&tmbx.tm_context, fxsave);
721 pt_thr_getfpregs(const td_thrhandle_t *th, prfpregset_t *fpregs)
723 const td_thragent_t *ta = th->th_ta;
724 struct kse_thr_mailbox tmbx;
725 psaddr_t tcb_addr, tmbx_addr, ptr;
731 ret = pt_validate(th);
735 if (ta->map[th->th_tid].type == PT_LWP) {
736 ret = ps_lgetfpregs(ta->ph, ta->map[th->th_tid].lwp, fpregs);
740 ret = ps_pread(ta->ph, ta->map[th->th_tid].thr + ta->thread_off_tcb,
741 &tcb_addr, sizeof(tcb_addr));
744 tmbx_addr = tcb_addr + ta->thread_off_tmbx;
745 ptr = tmbx_addr + offsetof(struct kse_thr_mailbox, tm_lwp);
746 ret = ps_pread(ta->ph, ptr, &lwp, sizeof(lwpid_t));
750 ret = ps_lgetfpregs(ta->ph, lwp, fpregs);
754 ret = ps_pread(ta->ph, tmbx_addr, &tmbx, sizeof(tmbx));
757 pt_ucontext_to_fpreg(&tmbx.tm_context, fpregs);
762 pt_thr_getgregs(const td_thrhandle_t *th, prgregset_t gregs)
764 const td_thragent_t *ta = th->th_ta;
765 struct kse_thr_mailbox tmbx;
766 psaddr_t tcb_addr, tmbx_addr, ptr;
772 ret = pt_validate(th);
776 if (ta->map[th->th_tid].type == PT_LWP) {
777 ret = ps_lgetregs(ta->ph,
778 ta->map[th->th_tid].lwp, gregs);
782 ret = ps_pread(ta->ph, ta->map[th->th_tid].thr + ta->thread_off_tcb,
783 &tcb_addr, sizeof(tcb_addr));
786 tmbx_addr = tcb_addr + ta->thread_off_tmbx;
787 ptr = tmbx_addr + offsetof(struct kse_thr_mailbox, tm_lwp);
788 ret = ps_pread(ta->ph, ptr, &lwp, sizeof(lwpid_t));
792 ret = ps_lgetregs(ta->ph, lwp, gregs);
795 ret = ps_pread(ta->ph, tmbx_addr, &tmbx, sizeof(tmbx));
798 pt_ucontext_to_reg(&tmbx.tm_context, gregs);
804 pt_thr_setxmmregs(const td_thrhandle_t *th, const char *fxsave)
806 const td_thragent_t *ta = th->th_ta;
807 struct kse_thr_mailbox tmbx;
808 psaddr_t tcb_addr, tmbx_addr, ptr;
816 ret = pt_validate(th);
820 if (ta->map[th->th_tid].type == PT_LWP) {
821 ret = ps_lsetxmmregs(ta->ph, ta->map[th->th_tid].lwp, fxsave);
825 ret = ps_pread(ta->ph, ta->map[th->th_tid].thr +
827 &tcb_addr, sizeof(tcb_addr));
830 tmbx_addr = tcb_addr + ta->thread_off_tmbx;
831 ptr = tmbx_addr + offsetof(struct kse_thr_mailbox, tm_lwp);
832 ret = ps_pread(ta->ph, ptr, &lwp, sizeof(lwpid_t));
836 ret = ps_lsetxmmregs(ta->ph, lwp, fxsave);
840 * Read a copy of context, this makes sure that registers
841 * not covered by structure reg won't be clobbered
843 ret = ps_pread(ta->ph, tmbx_addr, &tmbx, sizeof(tmbx));
847 pt_fxsave_to_ucontext(fxsave, &tmbx.tm_context);
848 ret = ps_pwrite(ta->ph, tmbx_addr, &tmbx, sizeof(tmbx));
854 pt_thr_setfpregs(const td_thrhandle_t *th, const prfpregset_t *fpregs)
856 const td_thragent_t *ta = th->th_ta;
857 struct kse_thr_mailbox tmbx;
858 psaddr_t tcb_addr, tmbx_addr, ptr;
864 ret = pt_validate(th);
868 if (ta->map[th->th_tid].type == PT_LWP) {
869 ret = ps_lsetfpregs(ta->ph, ta->map[th->th_tid].lwp, fpregs);
873 ret = ps_pread(ta->ph, ta->map[th->th_tid].thr +
875 &tcb_addr, sizeof(tcb_addr));
878 tmbx_addr = tcb_addr + ta->thread_off_tmbx;
879 ptr = tmbx_addr + offsetof(struct kse_thr_mailbox, tm_lwp);
880 ret = ps_pread(ta->ph, ptr, &lwp, sizeof(lwpid_t));
884 ret = ps_lsetfpregs(ta->ph, lwp, fpregs);
888 * Read a copy of context, this makes sure that registers
889 * not covered by structure reg won't be clobbered
891 ret = ps_pread(ta->ph, tmbx_addr, &tmbx, sizeof(tmbx));
895 pt_fpreg_to_ucontext(fpregs, &tmbx.tm_context);
896 ret = ps_pwrite(ta->ph, tmbx_addr, &tmbx, sizeof(tmbx));
901 pt_thr_setgregs(const td_thrhandle_t *th, const prgregset_t gregs)
903 const td_thragent_t *ta = th->th_ta;
904 struct kse_thr_mailbox tmbx;
905 psaddr_t tcb_addr, tmbx_addr, ptr;
911 ret = pt_validate(th);
915 if (ta->map[th->th_tid].type == PT_LWP) {
916 ret = ps_lsetregs(ta->ph, ta->map[th->th_tid].lwp, gregs);
920 ret = ps_pread(ta->ph, ta->map[th->th_tid].thr +
922 &tcb_addr, sizeof(tcb_addr));
925 tmbx_addr = tcb_addr + ta->thread_off_tmbx;
926 ptr = tmbx_addr + offsetof(struct kse_thr_mailbox, tm_lwp);
927 ret = ps_pread(ta->ph, ptr, &lwp, sizeof(lwpid_t));
931 ret = ps_lsetregs(ta->ph, lwp, gregs);
936 * Read a copy of context, make sure that registers
937 * not covered by structure reg won't be clobbered
939 ret = ps_pread(ta->ph, tmbx_addr, &tmbx, sizeof(tmbx));
942 pt_reg_to_ucontext(gregs, &tmbx.tm_context);
943 ret = ps_pwrite(ta->ph, tmbx_addr, &tmbx, sizeof(tmbx));
948 pt_thr_event_enable(const td_thrhandle_t *th __unused, int en __unused)
955 pt_thr_set_event(const td_thrhandle_t *th __unused,
956 td_thr_events_t *setp __unused)
963 pt_thr_clear_event(const td_thrhandle_t *th __unused,
964 td_thr_events_t *setp __unused)
971 pt_thr_event_getmsg(const td_thrhandle_t *th __unused,
972 td_event_msg_t *msg __unused)
979 pt_thr_sstep(const td_thrhandle_t *th, int step)
981 const td_thragent_t *ta = th->th_ta;
982 struct kse_thr_mailbox tmbx;
984 psaddr_t tcb_addr, tmbx_addr;
991 ret = pt_validate(th);
995 if (ta->map[th->th_tid].type == PT_LWP)
998 ret = ps_pread(ta->ph, ta->map[th->th_tid].thr +
1000 &tcb_addr, sizeof(tcb_addr));
1004 /* Clear or set single step flag in thread mailbox */
1005 ret = ps_pread(ta->ph,
1006 tcb_addr + ta->thread_off_tmbx +
1007 offsetof(struct kse_thr_mailbox, tm_dflags),
1008 &dflags, sizeof(uint32_t));
1012 dflags |= TMDF_SSTEP;
1014 dflags &= ~TMDF_SSTEP;
1015 ret = ps_pwrite(ta->ph,
1016 tcb_addr + ta->thread_off_tmbx +
1017 offsetof(struct kse_thr_mailbox, tm_dflags),
1018 &dflags, sizeof(uint32_t));
1022 ret = ps_pread(ta->ph,
1023 tcb_addr + ta->thread_off_tmbx +
1024 offsetof(struct kse_thr_mailbox, tm_lwp),
1025 &lwp, sizeof(lwpid_t));
1031 tmbx_addr = tcb_addr + ta->thread_off_tmbx;
1033 * context is in userland, some architectures store
1034 * single step status in registers, we should change
1037 ret = ps_pread(ta->ph, tmbx_addr, &tmbx, sizeof(tmbx));
1039 pt_ucontext_to_reg(&tmbx.tm_context, ®s);
1040 /* only write out if it is really changed. */
1041 if (pt_reg_sstep(®s, step) != 0) {
1042 pt_reg_to_ucontext(®s, &tmbx.tm_context);
1043 ret = ps_pwrite(ta->ph, tmbx_addr, &tmbx,
1051 pt_unmap_lwp(const td_thragent_t *ta, lwpid_t lwp)
1055 for (i = 0; i < ta->map_len; ++i) {
1056 if (ta->map[i].type == PT_LWP && ta->map[i].lwp == lwp) {
1057 ta->map[i].type = PT_NONE;
1064 pt_validate(const td_thrhandle_t *th)
1067 if (th->th_tid < 0 || th->th_tid >= (long)th->th_ta->map_len ||
1068 th->th_ta->map[th->th_tid].type == PT_NONE)
1074 pt_thr_tls_get_addr(const td_thrhandle_t *th, psaddr_t _linkmap, size_t offset,
1077 const td_thragent_t *ta = th->th_ta;
1078 psaddr_t dtv_addr, obj_entry, tcb_addr;
1081 /* linkmap is a member of Obj_Entry */
1082 obj_entry = _linkmap - ta->thread_off_linkmap;
1084 /* get tlsindex of the object file */
1085 ret = ps_pread(ta->ph,
1086 obj_entry + ta->thread_off_tlsindex,
1087 &tls_index, sizeof(tls_index));
1091 /* get thread tcb */
1092 ret = ps_pread(ta->ph, ta->map[th->th_tid].thr +
1094 &tcb_addr, sizeof(tcb_addr));
1098 /* get dtv array address */
1099 ret = ps_pread(ta->ph, tcb_addr + ta->thread_off_dtv,
1100 &dtv_addr, sizeof(dtv_addr));
1103 /* now get the object's tls block base address */
1104 ret = ps_pread(ta->ph, dtv_addr + sizeof(void *) * (tls_index + 1),
1105 address, sizeof(*address));
1113 static struct ta_ops libpthread_db_ops = {
1115 .to_ta_clear_event = pt_ta_clear_event,
1116 .to_ta_delete = pt_ta_delete,
1117 .to_ta_event_addr = pt_ta_event_addr,
1118 .to_ta_event_getmsg = pt_ta_event_getmsg,
1119 .to_ta_map_id2thr = pt_ta_map_id2thr,
1120 .to_ta_map_lwp2thr = pt_ta_map_lwp2thr,
1121 .to_ta_new = pt_ta_new,
1122 .to_ta_set_event = pt_ta_set_event,
1123 .to_ta_thr_iter = pt_ta_thr_iter,
1124 .to_ta_tsd_iter = pt_ta_tsd_iter,
1125 .to_thr_clear_event = pt_thr_clear_event,
1126 .to_thr_dbresume = pt_thr_dbresume,
1127 .to_thr_dbsuspend = pt_thr_dbsuspend,
1128 .to_thr_event_enable = pt_thr_event_enable,
1129 .to_thr_event_getmsg = pt_thr_event_getmsg,
1130 .to_thr_old_get_info = pt_thr_old_get_info,
1131 .to_thr_get_info = pt_thr_get_info,
1132 .to_thr_getfpregs = pt_thr_getfpregs,
1133 .to_thr_getgregs = pt_thr_getgregs,
1134 .to_thr_set_event = pt_thr_set_event,
1135 .to_thr_setfpregs = pt_thr_setfpregs,
1136 .to_thr_setgregs = pt_thr_setgregs,
1137 .to_thr_validate = pt_thr_validate,
1138 .to_thr_tls_get_addr = pt_thr_tls_get_addr,
1140 /* FreeBSD specific extensions. */
1141 .to_thr_sstep = pt_thr_sstep,
1143 .to_thr_getxmmregs = pt_thr_getxmmregs,
1144 .to_thr_setxmmregs = pt_thr_setxmmregs,
1148 DATA_SET(__ta_ops, libpthread_db_ops);