1 /*
2 * Copyright (c) 2004 Marcel Moolenaar
3 * Copyright (c) 2005 David Xu
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
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.
15 *
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.
26 *
27 * $DragonFly: src/lib/libthread_db/libthread_xu.c,v 1.3 2005/05/07 10:08:08 davidxu Exp $
28 */
29
30 #include <sys/cdefs.h>
31
32 #include <proc_service.h>
33 #include <stddef.h>
34 #include <stdlib.h>
35 #include <string.h>
36 #include <machine/tls.h>
37 #include <sys/types.h>
38 #include <sys/ptrace.h>
39 #include <rtld.h>
40 #include <thread_db.h>
41 #include <unistd.h>
42
43 #include "thread_db_int.h"
44
45 #define TERMINATED 1
46
47 struct td_thragent {
48 TD_THRAGENT_FIELDS;
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;
57 int thread_max_keys;
58 int thread_off_attr_flags;
59 int thread_off_dtv;
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;
65 int thread_off_next;
66 int thread_off_report_events;
67 int thread_off_state;
68 int thread_off_tcb;
69 int thread_off_tid;
70 int thread_off_tlsindex;
71 int thread_size_key;
72 int thread_state_running;
73 int thread_state_zoombie;
74 };
75
76 #define P2T(c) ps2td(c)
77
78 static int pt_validate(const td_thrhandle_t *th);
79
80 static int
ps2td(int c)81 ps2td(int c)
82 {
83 switch (c) {
84 case PS_OK:
85 return TD_OK;
86 case PS_ERR:
87 return TD_ERR;
88 case PS_BADPID:
89 return TD_BADPH;
90 case PS_BADLID:
91 return TD_NOLWP;
92 case PS_BADADDR:
93 return TD_ERR;
94 case PS_NOSYM:
95 return TD_NOLIBTHREAD;
96 case PS_NOFREGS:
97 return TD_NOFPREGS;
98 default:
99 return TD_ERR;
100 }
101 }
102
103 static td_err_e
pt_init(void)104 pt_init(void)
105 {
106 return (0);
107 }
108
109 static td_err_e
pt_ta_new(struct ps_prochandle * ph,td_thragent_t ** pta)110 pt_ta_new(struct ps_prochandle *ph, td_thragent_t **pta)
111 {
112 #define LOOKUP_SYM(proc, sym, addr) \
113 ret = ps_pglobal_lookup(proc, NULL, sym, addr); \
114 if (ret != 0) { \
115 TDBG("can not find symbol: %s\n", sym); \
116 ret = TD_NOLIBTHREAD; \
117 goto error; \
118 }
119
120 #define LOOKUP_VAL(proc, sym, val) \
121 ret = ps_pglobal_lookup(proc, NULL, sym, &vaddr);\
122 if (ret != 0) { \
123 TDBG("can not find symbol: %s\n", sym); \
124 ret = TD_NOLIBTHREAD; \
125 goto error; \
126 } \
127 ret = ps_pread(proc, vaddr, val, sizeof(int)); \
128 if (ret != 0) { \
129 TDBG("can not read value of %s\n", sym);\
130 ret = TD_NOLIBTHREAD; \
131 goto error; \
132 }
133
134 td_thragent_t *ta;
135 psaddr_t vaddr;
136 int dbg;
137 int ret;
138
139 TDBG_FUNC();
140
141 ta = malloc(sizeof(td_thragent_t));
142 if (ta == NULL)
143 return (TD_MALLOC);
144
145 ta->ph = ph;
146
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);
169
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);
173
174 dbg = getpid();
175 /*
176 * If this fails it probably means we're debugging a core file and
177 * can't write to it.
178 */
179 ps_pwrite(ph, ta->libthread_xu_debug_addr, &dbg, sizeof(int));
180 *pta = ta;
181 return (0);
182
183 error:
184 free(ta);
185 return (ret);
186 }
187
188 static td_err_e
pt_ta_delete(td_thragent_t * ta)189 pt_ta_delete(td_thragent_t *ta)
190 {
191 int dbg;
192
193 TDBG_FUNC();
194
195 dbg = 0;
196 /*
197 * Error returns from this write are not really a problem;
198 * the process doesn't exist any more.
199 */
200 ps_pwrite(ta->ph, ta->libthread_xu_debug_addr, &dbg, sizeof(int));
201 free(ta);
202 return (TD_OK);
203 }
204
205 static td_err_e
pt_ta_map_id2thr(const td_thragent_t * ta,thread_t id,td_thrhandle_t * th)206 pt_ta_map_id2thr(const td_thragent_t *ta, thread_t id, td_thrhandle_t *th)
207 {
208 prgregset_t gregs;
209 TAILQ_HEAD(, pthread) thread_list;
210 psaddr_t pt;
211 long lwp;
212 int ret;
213
214 TDBG_FUNC();
215
216 if (id == 0)
217 return (TD_NOTHR);
218 ret = ps_pread(ta->ph, ta->thread_list_addr, &thread_list,
219 sizeof(thread_list));
220 if (ret != 0)
221 return (P2T(ret));
222 /* Iterate through thread list to find pthread */
223 pt = (psaddr_t)thread_list.tqh_first;
224 while (pt != NULL) {
225 ret = ps_pread(ta->ph, pt + ta->thread_off_tid,
226 &lwp, sizeof(lwp));
227 if (ret != 0)
228 return (P2T(ret));
229 if (lwp == id)
230 break;
231 /* get next thread */
232 ret = ps_pread(ta->ph,
233 pt + ta->thread_off_next,
234 &pt, sizeof(pt));
235 if (ret != 0)
236 return (P2T(ret));
237 }
238 if (pt == NULL)
239 return (TD_NOTHR);
240 th->th_ta = ta;
241 th->th_tid = id;
242 th->th_thread = pt;
243 return (TD_OK);
244 }
245
246 static td_err_e
pt_ta_map_lwp2thr(const td_thragent_t * ta,lwpid_t lwp,td_thrhandle_t * th)247 pt_ta_map_lwp2thr(const td_thragent_t *ta, lwpid_t lwp, td_thrhandle_t *th)
248 {
249 return (pt_ta_map_id2thr(ta, lwp, th));
250 }
251
252 static td_err_e
pt_ta_thr_iter(const td_thragent_t * ta,td_thr_iter_f * callback,void * cbdata_p,td_thr_state_e state,int ti_pri,sigset_t * ti_sigmask_p,unsigned int ti_user_flags)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)
258 {
259 TAILQ_HEAD(, pthread) thread_list;
260 td_thrhandle_t th;
261 psaddr_t pt;
262 long lwp;
263 int ret;
264
265 TDBG_FUNC();
266
267 ret = ps_pread(ta->ph, ta->thread_list_addr, &thread_list,
268 sizeof(thread_list));
269 if (ret != 0)
270 return (P2T(ret));
271 pt = (psaddr_t)thread_list.tqh_first;
272 while (pt != 0) {
273 ret = ps_pread(ta->ph, pt + ta->thread_off_tid, &lwp,
274 sizeof(lwp));
275 if (ret != 0)
276 return (P2T(ret));
277 if (lwp != 0 && lwp != TERMINATED) {
278 th.th_ta = ta;
279 th.th_tid = (thread_t)lwp;
280 th.th_thread = pt;
281 if ((*callback)(&th, cbdata_p))
282 return (TD_DBERR);
283 }
284 /* get next thread */
285 ret = ps_pread(ta->ph, pt + ta->thread_off_next, &pt,
286 sizeof(pt));
287 if (ret != 0)
288 return (P2T(ret));
289 }
290 return (TD_OK);
291 }
292
293 static td_err_e
pt_ta_tsd_iter(const td_thragent_t * ta,td_key_iter_f * ki,void * arg)294 pt_ta_tsd_iter(const td_thragent_t *ta, td_key_iter_f *ki, void *arg)
295 {
296 char *keytable;
297 void *destructor;
298 int i, ret, allocated;
299
300 TDBG_FUNC();
301
302 keytable = malloc(ta->thread_max_keys * ta->thread_size_key);
303 if (keytable == NULL)
304 return (TD_MALLOC);
305 ret = ps_pread(ta->ph, (psaddr_t)ta->thread_keytable_addr, keytable,
306 ta->thread_max_keys * ta->thread_size_key);
307 if (ret != 0) {
308 free(keytable);
309 return (P2T(ret));
310 }
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);
316 if (allocated) {
317 ret = (ki)(i, destructor, arg);
318 if (ret != 0) {
319 free(keytable);
320 return (TD_DBERR);
321 }
322 }
323 }
324 free(keytable);
325 return (TD_OK);
326 }
327
328 static td_err_e
pt_ta_event_addr(const td_thragent_t * ta,td_event_e event,td_notify_t * ptr)329 pt_ta_event_addr(const td_thragent_t *ta, td_event_e event, td_notify_t *ptr)
330 {
331
332 TDBG_FUNC();
333
334 switch (event) {
335 case TD_CREATE:
336 ptr->type = NOTIFY_BPT;
337 ptr->u.bptaddr = ta->thread_bp_create_addr;
338 return (0);
339 case TD_DEATH:
340 ptr->type = NOTIFY_BPT;
341 ptr->u.bptaddr = ta->thread_bp_death_addr;
342 return (0);
343 default:
344 return (TD_ERR);
345 }
346 }
347
348 static td_err_e
pt_ta_set_event(const td_thragent_t * ta,td_thr_events_t * events)349 pt_ta_set_event(const td_thragent_t *ta, td_thr_events_t *events)
350 {
351 td_thr_events_t mask;
352 int ret;
353
354 TDBG_FUNC();
355 ret = ps_pread(ta->ph, ta->thread_event_mask_addr, &mask,
356 sizeof(mask));
357 if (ret != 0)
358 return (P2T(ret));
359 mask |= *events;
360 ret = ps_pwrite(ta->ph, ta->thread_event_mask_addr, &mask,
361 sizeof(mask));
362 return (P2T(ret));
363 }
364
365 static td_err_e
pt_ta_clear_event(const td_thragent_t * ta,td_thr_events_t * events)366 pt_ta_clear_event(const td_thragent_t *ta, td_thr_events_t *events)
367 {
368 td_thr_events_t mask;
369 int ret;
370
371 TDBG_FUNC();
372 ret = ps_pread(ta->ph, ta->thread_event_mask_addr, &mask,
373 sizeof(mask));
374 if (ret != 0)
375 return (P2T(ret));
376 mask &= ~*events;
377 ret = ps_pwrite(ta->ph, ta->thread_event_mask_addr, &mask,
378 sizeof(mask));
379 return (P2T(ret));
380 }
381
382 static td_err_e
pt_ta_event_getmsg(const td_thragent_t * ta,td_event_msg_t * msg)383 pt_ta_event_getmsg(const td_thragent_t *ta, td_event_msg_t *msg)
384 {
385 static td_thrhandle_t handle;
386
387 psaddr_t pt, pt_temp;
388 td_thr_events_e tmp;
389 long lwp;
390 int ret;
391
392 TDBG_FUNC();
393
394 ret = ps_pread(ta->ph, ta->thread_last_event_addr, &pt, sizeof(pt));
395 if (ret != 0)
396 return (P2T(ret));
397 if (pt == NULL)
398 return (TD_NOMSG);
399 /*
400 * Take the event pointer, at the time, libthr only reports event
401 * once a time, so it is not a link list.
402 */
403 pt_temp = NULL;
404 ps_pwrite(ta->ph, ta->thread_last_event_addr, &pt_temp, sizeof(pt_temp));
405
406 /* Read event info */
407 ret = ps_pread(ta->ph, pt + ta->thread_off_event_buf, msg, sizeof(*msg));
408 if (ret != 0)
409 return (P2T(ret));
410 if (msg->event == 0)
411 return (TD_NOMSG);
412 /* Clear event */
413 tmp = 0;
414 ps_pwrite(ta->ph, pt + ta->thread_off_event_buf, &tmp, sizeof(tmp));
415 /* Convert event */
416 pt = (psaddr_t)msg->th_p;
417 ret = ps_pread(ta->ph, pt + ta->thread_off_tid, &lwp, sizeof(lwp));
418 if (ret != 0)
419 return (P2T(ret));
420 handle.th_ta = ta;
421 handle.th_tid = lwp;
422 handle.th_thread = pt;
423 msg->th_p = &handle;
424 return (0);
425 }
426
427 static td_err_e
pt_dbsuspend(const td_thrhandle_t * th,int suspend)428 pt_dbsuspend(const td_thrhandle_t *th, int suspend)
429 {
430 td_thragent_t *ta = (td_thragent_t *)th->th_ta;
431 int ret;
432
433 TDBG_FUNC();
434
435 ret = pt_validate(th);
436 if (ret)
437 return (ret);
438
439 if (suspend)
440 ret = ps_lstop(ta->ph, th->th_tid);
441 else
442 ret = ps_lcontinue(ta->ph, th->th_tid);
443 return (P2T(ret));
444 }
445
446 static td_err_e
pt_thr_dbresume(const td_thrhandle_t * th)447 pt_thr_dbresume(const td_thrhandle_t *th)
448 {
449 TDBG_FUNC();
450
451 return pt_dbsuspend(th, 0);
452 }
453
454 static td_err_e
pt_thr_dbsuspend(const td_thrhandle_t * th)455 pt_thr_dbsuspend(const td_thrhandle_t *th)
456 {
457 TDBG_FUNC();
458
459 return pt_dbsuspend(th, 1);
460 }
461
462 static td_err_e
pt_thr_validate(const td_thrhandle_t * th)463 pt_thr_validate(const td_thrhandle_t *th)
464 {
465 td_thrhandle_t temp;
466 int ret;
467
468 TDBG_FUNC();
469
470 ret = pt_ta_map_id2thr(th->th_ta, th->th_tid, &temp);
471 return (ret);
472 }
473
474 static td_err_e
pt_thr_get_info(const td_thrhandle_t * th,td_thrinfo_t * info)475 pt_thr_get_info(const td_thrhandle_t *th, td_thrinfo_t *info)
476 {
477 const td_thragent_t *ta = th->th_ta;
478 int state;
479 int ret;
480
481 TDBG_FUNC();
482
483 ret = pt_validate(th);
484 if (ret)
485 return (ret);
486 ret = ps_pread(ta->ph, th->th_thread + ta->thread_off_state,
487 &state, sizeof(state));
488 if (ret != 0)
489 return (P2T(ret));
490 ret = ps_pread(ta->ph, th->th_thread + ta->thread_off_report_events,
491 &info->ti_traceme, sizeof(int));
492 if (ret != 0)
493 return (P2T(ret));
494 ret = ps_pread(ta->ph, th->th_thread + ta->thread_off_event_mask,
495 &info->ti_events, sizeof(td_thr_events_t));
496 if (ret != 0)
497 return (P2T(ret));
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;
508 else
509 info->ti_state = TD_THR_SLEEP;
510 info->ti_type = TD_THR_USER;
511 return (0);
512 }
513
514 static td_err_e
pt_thr_getfpregs(const td_thrhandle_t * th,prfpregset_t * fpregs)515 pt_thr_getfpregs(const td_thrhandle_t *th, prfpregset_t *fpregs)
516 {
517 const td_thragent_t *ta = th->th_ta;
518 int ret;
519
520 TDBG_FUNC();
521
522 ret = pt_validate(th);
523 if (ret)
524 return (ret);
525
526 ret = ps_lgetfpregs(ta->ph, th->th_tid, fpregs);
527 return (P2T(ret));
528 }
529
530 static td_err_e
pt_thr_getgregs(const td_thrhandle_t * th,prgregset_t gregs)531 pt_thr_getgregs(const td_thrhandle_t *th, prgregset_t gregs)
532 {
533 const td_thragent_t *ta = th->th_ta;
534 int ret;
535
536 TDBG_FUNC();
537
538 ret = pt_validate(th);
539 if (ret)
540 return (ret);
541
542 ret = ps_lgetregs(ta->ph, th->th_tid, gregs);
543 return (P2T(ret));
544 }
545
546 static td_err_e
pt_thr_setfpregs(const td_thrhandle_t * th,const prfpregset_t * fpregs)547 pt_thr_setfpregs(const td_thrhandle_t *th, const prfpregset_t *fpregs)
548 {
549 const td_thragent_t *ta = th->th_ta;
550 int ret;
551
552 TDBG_FUNC();
553
554 ret = pt_validate(th);
555 if (ret)
556 return (ret);
557
558 ret = ps_lsetfpregs(ta->ph, th->th_tid, fpregs);
559 return (P2T(ret));
560 }
561
562 static td_err_e
pt_thr_setgregs(const td_thrhandle_t * th,const prgregset_t gregs)563 pt_thr_setgregs(const td_thrhandle_t *th, const prgregset_t gregs)
564 {
565 const td_thragent_t *ta = th->th_ta;
566 int ret;
567
568 TDBG_FUNC();
569
570 ret = pt_validate(th);
571 if (ret)
572 return (ret);
573
574 ret = ps_lsetregs(ta->ph, th->th_tid, gregs);
575 return (P2T(ret));
576 }
577
578 static td_err_e
pt_thr_event_enable(const td_thrhandle_t * th,int en)579 pt_thr_event_enable(const td_thrhandle_t *th, int en)
580 {
581 const td_thragent_t *ta = th->th_ta;
582 int ret;
583
584 TDBG_FUNC();
585 ret = ps_pwrite(ta->ph, th->th_thread + ta->thread_off_report_events,
586 &en, sizeof(int));
587 return (P2T(ret));
588 }
589
590 static td_err_e
pt_thr_set_event(const td_thrhandle_t * th,td_thr_events_t * setp)591 pt_thr_set_event(const td_thrhandle_t *th, td_thr_events_t *setp)
592 {
593 const td_thragent_t *ta = th->th_ta;
594 td_thr_events_t mask;
595 int ret;
596
597 TDBG_FUNC();
598 ret = ps_pread(ta->ph, th->th_thread + ta->thread_off_event_mask,
599 &mask, sizeof(mask));
600 mask |= *setp;
601 ret = ps_pwrite(ta->ph, th->th_thread + ta->thread_off_event_mask,
602 &mask, sizeof(mask));
603 return (P2T(ret));
604 }
605
606 static td_err_e
pt_thr_clear_event(const td_thrhandle_t * th,td_thr_events_t * setp)607 pt_thr_clear_event(const td_thrhandle_t *th, td_thr_events_t *setp)
608 {
609 const td_thragent_t *ta = th->th_ta;
610 td_thr_events_t mask;
611 int ret;
612
613 TDBG_FUNC();
614 ret = ps_pread(ta->ph, th->th_thread + ta->thread_off_event_mask,
615 &mask, sizeof(mask));
616 mask &= ~*setp;
617 ret = ps_pwrite(ta->ph, th->th_thread + ta->thread_off_event_mask,
618 &mask, sizeof(mask));
619 return (P2T(ret));
620 }
621
622 static td_err_e
pt_thr_event_getmsg(const td_thrhandle_t * th,td_event_msg_t * msg)623 pt_thr_event_getmsg(const td_thrhandle_t *th, td_event_msg_t *msg)
624 {
625 static td_thrhandle_t handle;
626 td_thragent_t *ta = (td_thragent_t *)th->th_ta;
627 psaddr_t pt, pt_temp;
628 long lwp;
629 int ret;
630 td_thr_events_e tmp;
631
632 TDBG_FUNC();
633 pt = th->th_thread;
634 ret = ps_pread(ta->ph, ta->thread_last_event_addr, &pt_temp, sizeof(pt_temp));
635 if (ret != 0)
636 return (P2T(ret));
637 /* Get event */
638 ret = ps_pread(ta->ph, pt + ta->thread_off_event_buf, msg, sizeof(*msg));
639 if (ret != 0)
640 return (P2T(ret));
641 if (msg->event == 0)
642 return (TD_NOMSG);
643 /*
644 * Take the event pointer, at the time, libthr only reports event
645 * once a time, so it is not a link list.
646 */
647 if (pt == pt_temp) {
648 pt_temp = NULL;
649 ps_pwrite(ta->ph, ta->thread_last_event_addr, &pt_temp, sizeof(pt_temp));
650 }
651 /* Clear event */
652 tmp = 0;
653 ps_pwrite(ta->ph, pt + ta->thread_off_event_buf, &tmp, sizeof(tmp));
654 /* Convert event */
655 pt = (psaddr_t)msg->th_p;
656 ret = ps_pread(ta->ph, pt + ta->thread_off_tid, &lwp, sizeof(lwp));
657 if (ret != 0)
658 return (P2T(ret));
659 handle.th_ta = ta;
660 handle.th_tid = lwp;
661 handle.th_thread = pt;
662 msg->th_p = &handle;
663 return (0);
664 }
665
666 static int
pt_validate(const td_thrhandle_t * th)667 pt_validate(const td_thrhandle_t *th)
668 {
669
670 if (th->th_tid == 0 || th->th_thread == NULL)
671 return (TD_ERR);
672 return (TD_OK);
673 }
674
675 static td_err_e
pt_thr_tls_get_addr(const td_thrhandle_t * th,void * _linkmap,size_t offset,void ** address)676 pt_thr_tls_get_addr(const td_thrhandle_t *th, void *_linkmap, size_t offset,
677 void **address)
678 {
679 char *obj_entry;
680 const td_thragent_t *ta = th->th_ta;
681 psaddr_t tcb_addr, *dtv_addr, tcb_tp;
682 int tls_index, ret;
683
684 /* linkmap is a member of Obj_Entry */
685 obj_entry = (char *)_linkmap - ta->thread_off_linkmap;
686
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));
691 if (ret != 0)
692 return (P2T(ret));
693
694 /* get thread tcb */
695 ret = ps_pread(ta->ph, th->th_thread + ta->thread_off_tcb,
696 &tcb_addr, sizeof(tcb_addr));
697 if (ret != 0)
698 return (P2T(ret));
699
700 /* get dtv array address */
701 ret = ps_pread(ta->ph, tcb_addr + ta->thread_off_dtv,
702 &dtv_addr, sizeof(dtv_addr));
703 if (ret != 0)
704 return (P2T(ret));
705 /* now get the object's tls block base address */
706 ret = ps_pread(ta->ph, &dtv_addr[tls_index+1], address,
707 sizeof(*address));
708 if (ret != 0)
709 return (P2T(ret));
710
711 *address += offset;
712 return (TD_OK);
713 }
714
715 struct ta_ops libthread_xu_ops = {
716 .to_init = pt_init,
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,
740 };
741