1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Copyright (c) 2012 by Delphix. All rights reserved.
25 * Copyright 2016, Joyent, Inc.
26 */
27
28 #include <sys/mdb_modapi.h>
29 #include <mdb/mdb_whatis.h>
30 #include <mdb/mdb_ctf.h>
31 #include <procfs.h>
32 #include <ucontext.h>
33 #include <siginfo.h>
34 #include <signal.h>
35 #include <setjmp.h>
36 #include <string.h>
37 #include <thr_uberdata.h>
38 #include "findstack.h"
39
40 static const char *
41 stack_flags(const stack_t *sp)
42 {
43 static char buf[32];
44
45 if (sp->ss_flags == 0)
46 (void) strcpy(buf, " 0");
47 else if (sp->ss_flags & ~(SS_ONSTACK | SS_DISABLE))
48 (void) mdb_snprintf(buf, sizeof (buf), " 0x%x", sp->ss_flags);
49 else {
50 buf[0] = '\0';
51 if (sp->ss_flags & SS_ONSTACK)
52 (void) strcat(buf, "|ONSTACK");
53 if (sp->ss_flags & SS_DISABLE)
54 (void) strcat(buf, "|DISABLE");
55 }
56
57 return (buf + 1);
58 }
59
60 /*ARGSUSED*/
61 static int
62 d_jmp_buf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
63 {
64 jmp_buf jb;
65 const ulong_t *b = (const ulong_t *)jb;
66
67 if (argc != 0)
68 return (DCMD_USAGE);
69
70 if (mdb_vread(&jb, sizeof (jb), addr) != sizeof (jb)) {
71 mdb_warn("failed to read jmp_buf at %p", addr);
72 return (DCMD_ERR);
73 }
74
75 #if defined(__sparc)
76 mdb_printf(" %%sp = 0x%lx\n", b[1]);
77 mdb_printf(" %%pc = 0x%lx %lA\n", b[2], b[2]);
78 mdb_printf(" %%fp = 0x%lx\n", b[3]);
79 mdb_printf(" %%i7 = 0x%lx %lA\n", b[4], b[4]);
80 #elif defined(__amd64)
81 mdb_printf(" %%rbx = 0x%lx\n", b[0]);
82 mdb_printf(" %%r12 = 0x%lx\n", b[1]);
83 mdb_printf(" %%r13 = 0x%lx\n", b[2]);
84 mdb_printf(" %%r14 = 0x%lx\n", b[3]);
85 mdb_printf(" %%r15 = 0x%lx\n", b[4]);
86 mdb_printf(" %%rbp = 0x%lx\n", b[5]);
87 mdb_printf(" %%rsp = 0x%lx\n", b[6]);
88 mdb_printf(" %%rip = 0x%lx %lA\n", b[7], b[7]);
89 #elif defined(__i386)
90 mdb_printf(" %%ebx = 0x%lx\n", b[0]);
91 mdb_printf(" %%esi = 0x%lx\n", b[1]);
92 mdb_printf(" %%edi = 0x%lx\n", b[2]);
93 mdb_printf(" %%ebp = 0x%lx\n", b[3]);
94 mdb_printf(" %%esp = 0x%lx\n", b[4]);
95 mdb_printf(" %%eip = 0x%lx %lA\n", b[5], b[5]);
96 #endif
97 return (DCMD_OK);
98 }
99
100 const mdb_bitmask_t uc_flags_bits[] = {
101 { "UC_SIGMASK", UC_SIGMASK, UC_SIGMASK },
102 { "UC_STACK", UC_STACK, UC_STACK },
103 { "UC_CPU", UC_CPU, UC_CPU },
104 { "UC_FPU", UC_FPU, UC_FPU },
105 #if defined(UC_INTR)
106 { "UC_INTR", UC_INTR, UC_INTR },
107 #endif
108 #if defined(UC_ASR)
109 { "UC_ASR", UC_ASR, UC_ASR },
110 #endif
111 { NULL, 0, 0 }
112 };
113
114 /*ARGSUSED*/
115 static int
116 d_ucontext(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
117 {
118 ucontext_t uc;
119
120 if (argc != 0)
121 return (DCMD_USAGE);
122
123 if (mdb_vread(&uc, sizeof (uc), addr) != sizeof (uc)) {
124 mdb_warn("failed to read ucontext at %p", addr);
125 return (DCMD_ERR);
126 }
127
128 mdb_printf(" flags = 0x%lx <%b>\n", uc.uc_flags,
129 (uint_t)uc.uc_flags, uc_flags_bits);
130 mdb_printf(" link = 0x%p\n", uc.uc_link);
131 mdb_printf(" sigmask = 0x%08x 0x%08x 0x%08x 0x%08x\n",
132 uc.uc_sigmask.__sigbits[0], uc.uc_sigmask.__sigbits[1],
133 uc.uc_sigmask.__sigbits[2], uc.uc_sigmask.__sigbits[3]);
134 mdb_printf(" stack = sp 0x%p size 0x%lx flags %s\n",
135 uc.uc_stack.ss_sp, uc.uc_stack.ss_size, stack_flags(&uc.uc_stack));
136 mdb_printf(" mcontext = 0x%p\n",
137 addr + OFFSETOF(ucontext_t, uc_mcontext));
138
139 return (DCMD_OK);
140 }
141
142 /*ARGSUSED*/
143 static int
144 d_sigjmp_buf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
145 {
146 #if defined(__sparc)
147 struct {
148 int sjs_flags;
149 greg_t sjs_sp;
150 greg_t sjs_pc;
151 greg_t sjs_fp;
152 greg_t sjs_i7;
153 ucontext_t *sjs_uclink;
154 ulong_t sjs_pad[_JBLEN - 6];
155 sigset_t sjs_sigmask;
156 #if defined(_LP64)
157 greg_t sjs_asi;
158 greg_t sjs_fprs;
159 #endif
160 stack_t sjs_stack;
161 } s;
162
163 if (argc != 0)
164 return (DCMD_USAGE);
165
166 if (mdb_vread(&s, sizeof (s), addr) != sizeof (s)) {
167 mdb_warn("failed to read sigjmp_buf at %p", addr);
168 return (DCMD_ERR);
169 }
170
171 mdb_printf(" flags = 0x%x\n", s.sjs_flags);
172 mdb_printf(" %%sp = 0x%lx %lA\n", s.sjs_sp, s.sjs_sp);
173 mdb_printf(" %%pc = 0x%lx %lA\n", s.sjs_pc, s.sjs_pc);
174 mdb_printf(" %%fp = 0x%lx %lA\n", s.sjs_fp, s.sjs_fp);
175 mdb_printf(" %%i7 = 0x%lx %lA\n", s.sjs_i7, s.sjs_i7);
176 mdb_printf(" uclink = %p\n", s.sjs_uclink);
177 mdb_printf(" sigset = 0x%08x 0x%08x 0x%08x 0x%08x\n",
178 s.sjs_sigmask.__sigbits[0], s.sjs_sigmask.__sigbits[1],
179 s.sjs_sigmask.__sigbits[2], s.sjs_sigmask.__sigbits[3]);
180 #if defined(_LP64)
181 mdb_printf(" %%asi = 0x%lx\n", s.sjs_asi);
182 mdb_printf(" %%fprs = 0x%lx\n", s.sjs_fprs);
183 #endif
184 mdb_printf(" stack = sp 0x%p size 0x%lx flags %s\n",
185 s.sjs_stack.ss_sp, s.sjs_stack.ss_size, stack_flags(&s.sjs_stack));
186
187 return (DCMD_OK);
188
189 #elif defined(__i386) || defined(__amd64)
190 return (d_ucontext(addr, flags, argc, argv));
191 #endif
192 }
193
194 /*ARGSUSED*/
195 static int
196 d_siginfo(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
197 {
198 static const char *const msname[] = {
199 "USER", "SYSTEM", "TRAP", "TFAULT", "DFAULT", "KFAULT",
200 "USER_LOCK", "SLEEP", "WAIT_CPU", "STOPPED"
201 };
202
203 char signame[SIG2STR_MAX];
204 siginfo_t si;
205 int i;
206
207 if (argc != 0)
208 return (DCMD_USAGE);
209
210 if (mdb_vread(&si, sizeof (si), addr) != sizeof (si)) {
211 mdb_warn("failed to read siginfo at %p", addr);
212 return (DCMD_ERR);
213 }
214
215 if (sig2str(si.si_signo, signame) == -1)
216 (void) strcpy(signame, "unknown");
217
218 mdb_printf(" signal %5d (%s)\n", si.si_signo, signame);
219 mdb_printf(" code %5d (", si.si_code);
220
221 switch (si.si_code) {
222 case SI_NOINFO:
223 mdb_printf("no info");
224 break;
225 case SI_DTRACE:
226 mdb_printf("from DTrace raise() action");
227 break;
228 case SI_RCTL:
229 mdb_printf("from rctl action");
230 break;
231 case SI_USER:
232 mdb_printf("user generated via kill");
233 break;
234 case SI_LWP:
235 mdb_printf("user generated via lwp_kill");
236 break;
237 case SI_QUEUE:
238 mdb_printf("user generated via sigqueue");
239 break;
240 case SI_TIMER:
241 mdb_printf("from timer expiration");
242 break;
243 case SI_ASYNCIO:
244 mdb_printf("from async i/o completion");
245 break;
246 case SI_MESGQ:
247 mdb_printf("from message arrival");
248 break;
249 default:
250 if (SI_FROMUSER(&si))
251 mdb_printf("from user process");
252 else
253 mdb_printf("from kernel");
254 }
255
256 mdb_printf(")\n errno %5d (%s)\n",
257 si.si_errno, strerror(si.si_errno));
258
259 if (si.si_code == SI_USER || si.si_code == SI_QUEUE) {
260 mdb_printf(" signal sent from PID %d (uid %d)\n",
261 si.si_pid, si.si_uid);
262 }
263
264 if (si.si_code == SI_QUEUE) {
265 mdb_printf(" signal value = 0t%d / %p\n",
266 si.si_value.sival_int, si.si_value.sival_ptr);
267 }
268
269 switch (si.si_signo) {
270 case SIGCLD:
271 mdb_printf(" signal sent from child PID %d (uid %d)\n",
272 si.si_pid, si.si_uid);
273 mdb_printf(" usr time = 0t%ld ticks, sys time = 0t%ld ticks\n",
274 si.si_utime, si.si_stime);
275 mdb_printf(" wait status = 0x%x\n", si.si_status);
276 break;
277
278 case SIGSEGV:
279 case SIGBUS:
280 case SIGILL:
281 case SIGTRAP:
282 case SIGFPE:
283 mdb_printf(" fault address = 0x%p\n trapno = %d\n",
284 si.si_addr, si.si_trapno);
285 mdb_printf(" instruction address = 0x%p %lA\n",
286 si.si_pc, si.si_pc);
287 break;
288
289 case SIGPOLL:
290 case SIGXFSZ:
291 mdb_printf(" fd = %d band = 0x%lx\n",
292 si.si_fd, si.si_band);
293 break;
294
295 case SIGPROF:
296 mdb_printf(" last fault address = 0x%p fault type = %d\n",
297 si.si_faddr, si.si_fault);
298 mdb_printf(" timestamp = 0t%ld sec 0t%ld nsec\n",
299 si.si_tstamp.tv_sec, si.si_tstamp.tv_nsec);
300
301 if (si.__data.__prof.__syscall != 0) {
302 mdb_printf(" system call %d (", si.si_syscall);
303 if (si.si_nsysarg > 0) {
304 mdb_printf("%lx", si.si_sysarg[0]);
305 for (i = 1; i < si.si_nsysarg; i++)
306 mdb_printf(", %lx", si.si_sysarg[i]);
307 }
308 mdb_printf(" )\n");
309 }
310
311 for (i = 0; i < sizeof (msname) / sizeof (msname[0]); i++) {
312 mdb_printf(" mstate[\"%s\"] = %d\n",
313 msname[i], si.si_mstate[i]);
314 }
315 break;
316 }
317
318 return (DCMD_OK);
319 }
320
321 static int
322 uc_walk_step(mdb_walk_state_t *wsp)
323 {
324 uintptr_t addr = wsp->walk_addr;
325 ucontext_t uc;
326
327 if (addr == NULL)
328 return (WALK_DONE);
329
330 if (mdb_vread(&uc, sizeof (uc), addr) != sizeof (uc)) {
331 mdb_warn("failed to read ucontext at %p", addr);
332 return (WALK_ERR);
333 }
334
335 wsp->walk_addr = (uintptr_t)uc.uc_link;
336 return (wsp->walk_callback(addr, &uc, wsp->walk_cbdata));
337 }
338
339 static int
340 oldc_walk_init(mdb_walk_state_t *wsp)
341 {
342 ssize_t nbytes = mdb_get_xdata("lwpstatus", NULL, 0);
343
344 if (nbytes <= 0) {
345 mdb_warn("lwpstatus information not available");
346 return (WALK_ERR);
347 }
348
349 if (wsp->walk_addr != NULL) {
350 mdb_warn("walker only supports global walk\n");
351 return (WALK_ERR);
352 }
353
354 wsp->walk_addr = nbytes; /* Use walk_addr to track size */
355 wsp->walk_data = mdb_alloc(nbytes, UM_SLEEP);
356
357 if (mdb_get_xdata("lwpstatus", wsp->walk_data, nbytes) != nbytes) {
358 mdb_warn("failed to read lwpstatus information");
359 mdb_free(wsp->walk_data, nbytes);
360 return (WALK_ERR);
361 }
362
363 wsp->walk_arg = wsp->walk_data; /* Use walk_arg to track pointer */
364 return (WALK_NEXT);
365 }
366
367 static int
368 oldc_walk_step(mdb_walk_state_t *wsp)
369 {
370 const lwpstatus_t *lsp, *end;
371
372 end = (const lwpstatus_t *)((uintptr_t)wsp->walk_data + wsp->walk_addr);
373 lsp = wsp->walk_arg;
374
375 wsp->walk_arg = (void *)(lsp + 1);
376
377 if (lsp < end) {
378 uintptr_t addr = lsp->pr_oldcontext;
379 ucontext_t uc;
380
381 if (addr == NULL)
382 return (WALK_NEXT);
383
384 if (mdb_vread(&uc, sizeof (uc), addr) != sizeof (uc)) {
385 mdb_warn("failed to read ucontext at %p", addr);
386 return (WALK_NEXT);
387 }
388
389 return (wsp->walk_callback(addr, &uc, wsp->walk_cbdata));
390 }
391
392 return (WALK_DONE);
393 }
394
395 static void
396 oldc_walk_fini(mdb_walk_state_t *wsp)
397 {
398 mdb_free(wsp->walk_data, wsp->walk_addr); /* walk_addr has size */
399 }
400
401 /*
402 * ==================== threads ==========================
403 * These are the interfaces that used to require libthread.
404 * Now, libthread has been folded into libc.
405 * =======================================================
406 */
407
408 /*
409 * prt_addr() is called up to three times to generate arguments for
410 * one call to mdb_printf(). We must return at least three different
411 * pointers to static storage for consecutive calls to prt_addr().
412 */
413 static const char *
414 prt_addr(void *addr, int pad)
415 {
416 static char buffer[4][24];
417 static int ix = 0;
418 char *buf;
419
420 if (ix == 4) /* use buffers in sequence: 0, 1, 2, 3 */
421 ix = 0;
422 buf = buffer[ix++];
423 if (addr == NULL)
424 return (pad? "<NULL> " : "<NULL>");
425 else {
426 #ifdef _LP64
427 (void) mdb_snprintf(buf, sizeof (buffer[0]), "0x%016lx", addr);
428 if (pad)
429 (void) strcpy(buf + 18, " ");
430 #else
431 (void) mdb_snprintf(buf, sizeof (buffer[0]), "0x%08lx", addr);
432 if (pad)
433 (void) strcpy(buf + 10, " ");
434 #endif /* _LP64 */
435 return (buf);
436 }
437 }
438
439 #define HD(str) mdb_printf(" " str "\n")
440 #define OFFSTR "+0x%-7lx "
441 #define OFFSET(member) ((size_t)OFFSETOF(ulwp_t, member))
442
443 /*ARGSUSED*/
444 static int
445 d_ulwp(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
446 {
447 ulwp_t ulwp;
448
449 if (argc != 0 || !(flags & DCMD_ADDRSPEC))
450 return (DCMD_USAGE);
451
452 if (mdb_vread(&ulwp, sizeof (ulwp), addr) != sizeof (ulwp) &&
453 (bzero(&ulwp, sizeof (ulwp)),
454 mdb_vread(&ulwp, REPLACEMENT_SIZE, addr)) != REPLACEMENT_SIZE) {
455 mdb_warn("failed to read ulwp at 0x%p", addr);
456 return (DCMD_ERR);
457 }
458
459 mdb_printf("%#a\n", addr);
460
461 HD("self uberdata");
462 mdb_printf(OFFSTR "%s %s\n",
463 OFFSET(ul_self),
464 prt_addr(ulwp.ul_self, 1),
465 prt_addr(ulwp.ul_uberdata, 0));
466
467 HD("tlsent ntlsent");
468 mdb_printf(OFFSTR "%s %ld\n",
469 OFFSET(ul_tlsent),
470 prt_addr(ulwp.ul_tlsent, 1),
471 ulwp.ul_ntlsent);
472
473 HD("forw back next");
474 mdb_printf(OFFSTR "%s %s %s\n",
475 OFFSET(ul_forw),
476 prt_addr(ulwp.ul_forw, 1),
477 prt_addr(ulwp.ul_back, 1),
478 prt_addr(ulwp.ul_next, 0));
479
480 HD("hash rval stk");
481 mdb_printf(OFFSTR "%s %s %s\n",
482 OFFSET(ul_hash),
483 prt_addr(ulwp.ul_hash, 1),
484 prt_addr(ulwp.ul_rval, 1),
485 prt_addr(ulwp.ul_stk, 0));
486
487 HD("mapsiz guardsize stktop stksiz");
488 mdb_printf(OFFSTR "%-10ld %-10ld %s %ld\n",
489 OFFSET(ul_mapsiz),
490 ulwp.ul_mapsiz,
491 ulwp.ul_guardsize,
492 prt_addr((void *)ulwp.ul_stktop, 1),
493 ulwp.ul_stksiz);
494
495 HD("ustack.ss_sp ustack.ss_size ustack.ss_flags");
496 mdb_printf(OFFSTR "%s %-21ld %s\n",
497 OFFSET(ul_ustack.ss_sp),
498 prt_addr(ulwp.ul_ustack.ss_sp, 1),
499 ulwp.ul_ustack.ss_size,
500 stack_flags(&ulwp.ul_ustack));
501
502 HD("ix lwpid pri epri policy cid");
503 mdb_printf(OFFSTR "%-10d %-10d %-10d %-10d %-10d %d\n",
504 OFFSET(ul_ix),
505 ulwp.ul_ix,
506 ulwp.ul_lwpid,
507 ulwp.ul_pri,
508 ulwp.ul_epri,
509 ulwp.ul_policy,
510 ulwp.ul_cid);
511
512 HD("cursig pleasestop stop signalled dead unwind");
513 mdb_printf(OFFSTR "%-10d ",
514 OFFSET(ul_cursig),
515 ulwp.ul_cursig);
516 mdb_printf(ulwp.ul_pleasestop? "0x%-8x " : "%-10d ",
517 ulwp.ul_pleasestop);
518 mdb_printf(ulwp.ul_stop? "0x%-8x " : "%-10d ",
519 ulwp.ul_stop);
520 mdb_printf("%-10d %-10d %d\n",
521 ulwp.ul_signalled,
522 ulwp.ul_dead,
523 ulwp.ul_unwind);
524
525 HD("detached writer stopping can'prolog preempt savpreempt");
526 mdb_printf(OFFSTR "%-10d %-10d %-10d %-10d %-10d %d\n",
527 OFFSET(ul_detached),
528 ulwp.ul_detached,
529 ulwp.ul_writer,
530 ulwp.ul_stopping,
531 ulwp.ul_cancel_prologue,
532 ulwp.ul_preempt,
533 ulwp.ul_savpreempt);
534
535 HD("sigsuspend main fork primarymap m'spinners d'noreserv");
536 mdb_printf(OFFSTR "%-10d %-10d %-10d %-10d %-10d %d\n",
537 OFFSET(ul_sigsuspend),
538 ulwp.ul_sigsuspend,
539 ulwp.ul_main,
540 ulwp.ul_fork,
541 ulwp.ul_primarymap,
542 ulwp.ul_max_spinners,
543 ulwp.ul_door_noreserve);
544
545 HD("queue_fifo c'w'defer e'detect' async_safe rt rtqueued");
546 mdb_printf(OFFSTR "%-10d %-10d %-10d %-10d %-10d %d\n",
547 OFFSET(ul_queue_fifo),
548 ulwp.ul_queue_fifo,
549 ulwp.ul_cond_wait_defer,
550 ulwp.ul_error_detection,
551 ulwp.ul_async_safe,
552 ulwp.ul_rt,
553 ulwp.ul_rtqueued);
554
555 HD("misaligned adapt'spin queue_spin critical sigdefer vfork");
556 mdb_printf(OFFSTR "%-10d %-10d %-10d %-10d %-10d %d\n",
557 OFFSET(ul_misaligned),
558 ulwp.ul_misaligned,
559 ulwp.ul_adaptive_spin,
560 ulwp.ul_queue_spin,
561 ulwp.ul_critical,
562 ulwp.ul_sigdefer,
563 ulwp.ul_vfork);
564
565 HD("cancelable c'pending c'disabled c'async save_async mutator");
566 mdb_printf(OFFSTR "%-10d %-10d %-10d %-10d %-10d %d\n",
567 OFFSET(ul_cancelable),
568 ulwp.ul_cancelable,
569 ulwp.ul_cancel_pending,
570 ulwp.ul_cancel_disabled,
571 ulwp.ul_cancel_async,
572 ulwp.ul_save_async,
573 ulwp.ul_mutator);
574
575 HD("created replace nocancel errno errnop");
576 mdb_printf(OFFSTR "%-10d %-10d %-10d %-10d %s\n",
577 OFFSET(ul_created),
578 ulwp.ul_created,
579 ulwp.ul_replace,
580 ulwp.ul_nocancel,
581 ulwp.ul_errno,
582 prt_addr(ulwp.ul_errnop, 0));
583
584 HD("clnup_hdr schedctl_called schedctl");
585 mdb_printf(OFFSTR "%s %s %s\n",
586 OFFSET(ul_clnup_hdr),
587 prt_addr(ulwp.ul_clnup_hdr, 1),
588 prt_addr(ulwp.ul_schedctl_called, 1),
589 prt_addr((void *)ulwp.ul_schedctl, 0));
590
591 HD("bindflags libc_locks stsd &ftsd");
592 mdb_printf(OFFSTR,
593 OFFSET(ul_bindflags));
594 mdb_printf(ulwp.ul_bindflags? "0x%-8x " : "%-10d ",
595 ulwp.ul_bindflags);
596 mdb_printf("%-10d ", ulwp.ul_libc_locks);
597 mdb_printf("%s %s\n",
598 prt_addr(ulwp.ul_stsd, 1),
599 prt_addr((void *)(addr + OFFSET(ul_ftsd[0])), 0));
600
601 HD("eventmask[0..1] eventnum eventdata");
602 mdb_printf(OFFSTR "0x%08x 0x%08x %-21d %s\n",
603 OFFSET(ul_td_evbuf.eventmask.event_bits[0]),
604 ulwp.ul_td_evbuf.eventmask.event_bits[0],
605 ulwp.ul_td_evbuf.eventmask.event_bits[1],
606 ulwp.ul_td_evbuf.eventnum,
607 prt_addr(ulwp.ul_td_evbuf.eventdata, 0));
608
609 HD("td'enable sync'reg qtype cv_wake rtld usropts");
610 mdb_printf(OFFSTR "%-10d %-10d %-10d %-10d %-10d ",
611 OFFSET(ul_td_events_enable),
612 ulwp.ul_td_events_enable,
613 ulwp.ul_sync_obj_reg,
614 ulwp.ul_qtype,
615 ulwp.ul_cv_wake,
616 ulwp.ul_rtld);
617 mdb_printf(ulwp.ul_usropts? "0x%x\n" : "%d\n",
618 ulwp.ul_usropts);
619
620 HD("startpc startarg wchan");
621 mdb_printf(OFFSTR "%s %s %s\n",
622 OFFSET(ul_startpc),
623 prt_addr((void *)ulwp.ul_startpc, 1),
624 prt_addr(ulwp.ul_startarg, 1),
625 prt_addr(ulwp.ul_wchan, 0));
626
627 HD("link sleepq cvmutex");
628 mdb_printf(OFFSTR "%s %s %s\n",
629 OFFSET(ul_link),
630 prt_addr(ulwp.ul_link, 1),
631 prt_addr(ulwp.ul_sleepq, 1),
632 prt_addr(ulwp.ul_cvmutex, 0));
633
634 HD("mxchain save_state");
635 mdb_printf(OFFSTR "%s %d\n",
636 OFFSET(ul_mxchain),
637 prt_addr(ulwp.ul_mxchain, 1),
638 ulwp.ul_save_state);
639
640 HD("rdlockcnt rd_rwlock rd_count");
641 mdb_printf(OFFSTR "%-21d %s %d\n",
642 OFFSET(ul_rdlockcnt),
643 ulwp.ul_rdlockcnt,
644 prt_addr(ulwp.ul_readlock.single.rd_rwlock, 1),
645 ulwp.ul_readlock.single.rd_count);
646
647 HD("heldlockcnt heldlocks tpdp");
648 mdb_printf(OFFSTR "%-21d %s %s\n",
649 OFFSET(ul_heldlockcnt),
650 ulwp.ul_heldlockcnt,
651 prt_addr(ulwp.ul_heldlocks.single, 1),
652 prt_addr(ulwp.ul_tpdp, 0));
653
654 HD("siglink s'l'spin s'l'spin2 s'l'sleep s'l'wakeup");
655 mdb_printf(OFFSTR "%s %-10d %-10d %-10d %d\n",
656 OFFSET(ul_siglink),
657 prt_addr(ulwp.ul_siglink, 1),
658 ulwp.ul_spin_lock_spin,
659 ulwp.ul_spin_lock_spin2,
660 ulwp.ul_spin_lock_sleep,
661 ulwp.ul_spin_lock_wakeup);
662
663 HD("&queue_root rtclassid pilocks");
664 mdb_printf(OFFSTR "%s %-10d %d\n",
665 OFFSET(ul_queue_root),
666 prt_addr((void *)(addr + OFFSET(ul_queue_root)), 1),
667 ulwp.ul_rtclassid,
668 ulwp.ul_pilocks);
669
670 /*
671 * The remainder of the ulwp_t structure
672 * is invalid if this is a replacement.
673 */
674 if (ulwp.ul_replace)
675 return (DCMD_OK);
676
677 HD("sigmask[0..3]");
678 mdb_printf(OFFSTR "0x%08x 0x%08x 0x%08x 0x%08x\n",
679 OFFSET(ul_sigmask.__sigbits[0]),
680 ulwp.ul_sigmask.__sigbits[0],
681 ulwp.ul_sigmask.__sigbits[1],
682 ulwp.ul_sigmask.__sigbits[2],
683 ulwp.ul_sigmask.__sigbits[3]);
684
685 HD("tmpmask[0..3]");
686 mdb_printf(OFFSTR "0x%08x 0x%08x 0x%08x 0x%08x\n",
687 OFFSET(ul_tmpmask.__sigbits[0]),
688 ulwp.ul_tmpmask.__sigbits[0],
689 ulwp.ul_tmpmask.__sigbits[1],
690 ulwp.ul_tmpmask.__sigbits[2],
691 ulwp.ul_tmpmask.__sigbits[3]);
692
693 HD("&siginfo &spinlock &fpuenv");
694 mdb_printf(OFFSTR "%s %s %s\n",
695 OFFSET(ul_siginfo),
696 prt_addr((void *)(addr + OFFSET(ul_siginfo)), 1),
697 prt_addr((void *)(addr + OFFSET(ul_spinlock)), 1),
698 prt_addr((void *)(addr + OFFSET(ul_fpuenv)), 0));
699
700 HD("tmem.size &tmem.roots");
701 mdb_printf(OFFSTR "%-21H %s\n",
702 OFFSET(ul_tmem),
703 ulwp.ul_tmem.tm_size,
704 prt_addr((void *)(addr + OFFSET(ul_tmem) + sizeof (size_t)), 0));
705
706 return (DCMD_OK);
707 }
708
709 /*
710 * Get the address of the unique uberdata_t structure.
711 */
712 static uintptr_t
713 uberdata_addr(void)
714 {
715 uintptr_t uaddr;
716 uintptr_t addr;
717 GElf_Sym sym;
718
719 if (mdb_lookup_by_obj("libc.so.1", "_tdb_bootstrap", &sym) != 0) {
720 mdb_warn("cannot find libc.so.1`_tdb_bootstrap");
721 return (NULL);
722 }
723 if (mdb_vread(&addr, sizeof (addr), sym.st_value) == sizeof (addr) &&
724 addr != NULL &&
725 mdb_vread(&uaddr, sizeof (uaddr), addr) == sizeof (uaddr) &&
726 uaddr != NULL) {
727 return (uaddr);
728 }
729 if (mdb_lookup_by_obj("libc.so.1", "_uberdata", &sym) != 0) {
730 mdb_warn("cannot find libc.so.1`_uberdata");
731 return (NULL);
732 }
733 return ((uintptr_t)sym.st_value);
734 }
735
736 #undef OFFSET
737 #define OFFSET(member) ((size_t)OFFSETOF(uberdata_t, member))
738
739 /*ARGSUSED*/
740 static int
741 d_uberdata(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
742 {
743 uberdata_t uberdata;
744 int i;
745
746 if (argc != 0)
747 return (DCMD_USAGE);
748 if (!(flags & DCMD_ADDRSPEC) && (addr = uberdata_addr()) == NULL)
749 return (DCMD_ERR);
750
751 if (mdb_vread(&uberdata, sizeof (uberdata), addr) !=
752 sizeof (uberdata)) {
753 mdb_warn("failed to read uberdata at 0x%p", addr);
754 return (DCMD_ERR);
755 }
756
757 mdb_printf("%#a\n", addr);
758
759 HD("&link_lock &ld_lock &fork_lock");
760 mdb_printf(OFFSTR "%s %s %s\n",
761 OFFSET(link_lock),
762 prt_addr((void *)(addr + OFFSET(link_lock)), 1),
763 prt_addr((void *)(addr + OFFSET(ld_lock)), 1),
764 prt_addr((void *)(addr + OFFSET(fork_lock)), 0));
765
766 HD("&atfork_lock &callout_lock &tdb_hash_lock");
767 mdb_printf(OFFSTR "%s %s %s\n",
768 OFFSET(atfork_lock),
769 prt_addr((void *)(addr + OFFSET(atfork_lock)), 1),
770 prt_addr((void *)(addr + OFFSET(callout_lock)), 1),
771 prt_addr((void *)(addr + OFFSET(tdb_hash_lock)), 0));
772
773 HD("&tdb_hash_lock_stats &siguaction[0]");
774 mdb_printf(OFFSTR "%s %s\n",
775 OFFSET(tdb_hash_lock_stats),
776 prt_addr((void *)(addr + OFFSET(tdb_hash_lock_stats)), 1),
777 prt_addr((void *)(addr + OFFSET(siguaction)), 0));
778
779 HD("&bucket free_list chunks");
780 for (i = 0; i < NBUCKETS; i++) {
781 mdb_printf(OFFSTR "%s %s %ld\n",
782 OFFSET(bucket[i]),
783 prt_addr((void *)(addr + OFFSET(bucket[i])), 1),
784 prt_addr(uberdata.bucket[i].free_list, 1),
785 uberdata.bucket[i].chunks);
786 }
787
788 HD("&atexit_root head exit_frame_monitor");
789 mdb_printf(OFFSTR "%s %s %s\n",
790 OFFSET(atexit_root),
791 prt_addr((void *)(addr + OFFSET(atexit_root.exitfns_lock)), 1),
792 prt_addr(uberdata.atexit_root.head, 1),
793 prt_addr(uberdata.atexit_root.exit_frame_monitor, 0));
794
795 HD("&quickexit_root head");
796 mdb_printf(OFFSTR "%s %s\n",
797 OFFSET(quickexit_root),
798 prt_addr((void *)(addr + OFFSET(quickexit_root.exitfns_lock)), 1),
799 prt_addr(uberdata.quickexit_root.head, 0));
800
801
802 HD("&tsd_metadata tsdm_nkeys tsdm_nused tsdm_destro");
803 mdb_printf(OFFSTR "%s %-10d %-10d %s\n",
804 OFFSET(tsd_metadata),
805 prt_addr((void *)(addr + OFFSET(tsd_metadata.tsdm_lock)), 1),
806 uberdata.tsd_metadata.tsdm_nkeys,
807 uberdata.tsd_metadata.tsdm_nused,
808 prt_addr((void *)uberdata.tsd_metadata.tsdm_destro, 0));
809
810 HD("&tls_metadata tls_modinfo.data tls_modinfo.size");
811 mdb_printf(OFFSTR "%s %s %ld\n",
812 OFFSET(tls_metadata),
813 prt_addr((void *)(addr + OFFSET(tls_metadata.tls_lock)), 1),
814 prt_addr(uberdata.tls_metadata.tls_modinfo.tls_data, 1),
815 uberdata.tls_metadata.tls_modinfo.tls_size);
816
817 HD(" static_tls.data static_tls.size");
818 mdb_printf(OFFSTR "%s %s %ld\n",
819 OFFSET(tls_metadata.static_tls),
820 " ",
821 prt_addr(uberdata.tls_metadata.static_tls.tls_data, 1),
822 uberdata.tls_metadata.static_tls.tls_size);
823
824 HD("primary_ma bucket_ini uflags.mt uflags.pad uflags.trs uflags.ted");
825 mdb_printf(OFFSTR "%-10d %-10d %-10d %-10d %-10d %d\n",
826 OFFSET(primary_map),
827 uberdata.primary_map,
828 uberdata.bucket_init,
829 uberdata.uberflags.uf_x.x_mt,
830 uberdata.uberflags.uf_x.x_pad,
831 uberdata.uberflags.uf_x.x_tdb_register_sync,
832 uberdata.uberflags.uf_x.x_thread_error_detection);
833
834 HD("queue_head thr_hash_table hash_size hash_mask");
835 mdb_printf(OFFSTR "%s %s %-10d 0x%x\n",
836 OFFSET(queue_head),
837 prt_addr(uberdata.queue_head, 1),
838 prt_addr(uberdata.thr_hash_table, 1),
839 uberdata.hash_size,
840 uberdata.hash_mask);
841
842 HD("ulwp_one all_lwps all_zombies");
843 mdb_printf(OFFSTR "%s %s %s\n",
844 OFFSET(ulwp_one),
845 prt_addr(uberdata.ulwp_one, 1),
846 prt_addr(uberdata.all_lwps, 1),
847 prt_addr(uberdata.all_zombies, 0));
848
849 HD("nthreads nzombies ndaemons pid sigacthandler");
850 mdb_printf(OFFSTR "%-10d %-10d %-10d %-10d %s\n",
851 OFFSET(nthreads),
852 uberdata.nthreads,
853 uberdata.nzombies,
854 uberdata.ndaemons,
855 (int)uberdata.pid,
856 prt_addr((void *)uberdata.sigacthandler, 0));
857
858 HD("lwp_stacks lwp_laststack nfreestack stk_cache");
859 mdb_printf(OFFSTR "%s %s %-10d %d\n",
860 OFFSET(lwp_stacks),
861 prt_addr(uberdata.lwp_stacks, 1),
862 prt_addr(uberdata.lwp_laststack, 1),
863 uberdata.nfreestack,
864 uberdata.thread_stack_cache);
865
866 HD("ulwp_freelist ulwp_lastfree ulwp_replace_free");
867 mdb_printf(OFFSTR "%s %s %s\n",
868 OFFSET(ulwp_freelist),
869 prt_addr(uberdata.ulwp_freelist, 1),
870 prt_addr(uberdata.ulwp_lastfree, 1),
871 prt_addr(uberdata.ulwp_replace_free, 0));
872
873 HD("ulwp_replace_last atforklist");
874 mdb_printf(OFFSTR "%s %s\n",
875 OFFSET(ulwp_replace_last),
876 prt_addr(uberdata.ulwp_replace_last, 1),
877 prt_addr(uberdata.atforklist, 0));
878
879 HD("robustlocks robustlist progname");
880 mdb_printf(OFFSTR "%s %s %s\n",
881 OFFSET(robustlocks),
882 prt_addr(uberdata.robustlocks, 1),
883 prt_addr(uberdata.robustlist, 1),
884 prt_addr(uberdata.progname, 0));
885
886 HD("tdb_bootstrap tdb_sync_addr_hash tdb_'count tdb_'fail");
887 mdb_printf(OFFSTR "%s %s %-10d %d\n",
888 OFFSET(tdb_bootstrap),
889 prt_addr(uberdata.tdb_bootstrap, 1),
890 prt_addr(uberdata.tdb.tdb_sync_addr_hash, 1),
891 uberdata.tdb.tdb_register_count,
892 uberdata.tdb.tdb_hash_alloc_failed);
893
894 HD("tdb_sync_addr_free tdb_sync_addr_last tdb_sync_alloc");
895 mdb_printf(OFFSTR "%s %s %ld\n",
896 OFFSET(tdb.tdb_sync_addr_free),
897 prt_addr(uberdata.tdb.tdb_sync_addr_free, 1),
898 prt_addr(uberdata.tdb.tdb_sync_addr_last, 1),
899 uberdata.tdb.tdb_sync_alloc);
900
901 HD("tdb_ev_global_mask tdb_events");
902 mdb_printf(OFFSTR "0x%08x 0x%08x %s\n",
903 OFFSET(tdb.tdb_ev_global_mask),
904 uberdata.tdb.tdb_ev_global_mask.event_bits[0],
905 uberdata.tdb.tdb_ev_global_mask.event_bits[1],
906 prt_addr((void *)uberdata.tdb.tdb_events, 0));
907
908 return (DCMD_OK);
909 }
910
911 static int
912 ulwp_walk_init(mdb_walk_state_t *wsp)
913 {
914 uintptr_t addr = wsp->walk_addr;
915 uintptr_t uber_addr;
916
917 if (addr == NULL &&
918 ((uber_addr = uberdata_addr()) == NULL ||
919 mdb_vread(&addr, sizeof (addr),
920 uber_addr + OFFSETOF(uberdata_t, all_lwps))
921 != sizeof (addr))) {
922 mdb_warn("cannot find 'uberdata.all_lwps'");
923 return (WALK_ERR);
924 }
925 if (addr == NULL)
926 return (WALK_DONE);
927 wsp->walk_addr = addr;
928 wsp->walk_data = (void *)addr;
929 return (WALK_NEXT);
930 }
931
932 static int
933 ulwp_walk_step(mdb_walk_state_t *wsp)
934 {
935 uintptr_t addr = wsp->walk_addr;
936 ulwp_t ulwp;
937
938 if (addr == NULL)
939 return (WALK_DONE);
940 if (mdb_vread(&ulwp, sizeof (ulwp), addr) != sizeof (ulwp) &&
941 (bzero(&ulwp, sizeof (ulwp)),
942 mdb_vread(&ulwp, REPLACEMENT_SIZE, addr)) != REPLACEMENT_SIZE) {
943 mdb_warn("failed to read ulwp at 0x%p", addr);
944 return (WALK_ERR);
945 }
946 /*
947 * If we have looped around to the beginning
948 * of the circular linked list, we are done.
949 */
950 if ((wsp->walk_addr = (uintptr_t)ulwp.ul_forw)
951 == (uintptr_t)wsp->walk_data)
952 wsp->walk_addr = NULL;
953 return (wsp->walk_callback(addr, &ulwp, wsp->walk_cbdata));
954 }
955
956 /* Avoid classifying NULL pointers as part of the main stack on x86 */
957 #define MIN_STACK_ADDR (0x10000ul)
958
959 static int
960 whatis_walk_ulwp(uintptr_t addr, const ulwp_t *ulwp, mdb_whatis_t *w)
961 {
962 uintptr_t cur;
963 lwpid_t id = ulwp->ul_lwpid;
964 uintptr_t top, base, size;
965
966 while (mdb_whatis_match(w, addr, sizeof (ulwp_t), &cur))
967 mdb_whatis_report_object(w, cur, addr,
968 "allocated as thread %#r's ulwp_t\n", id);
969
970 top = (uintptr_t)ulwp->ul_stktop;
971 size = ulwp->ul_stksiz;
972
973 /*
974 * The main stack ends up being a little weird, especially if
975 * the stack ulimit is unlimited. This tries to take that into
976 * account.
977 */
978 if (size > top)
979 size = top;
980 if (top > MIN_STACK_ADDR && top - size < MIN_STACK_ADDR)
981 size = top - MIN_STACK_ADDR;
982
983 base = top - size;
984
985 while (mdb_whatis_match(w, base, size, &cur))
986 mdb_whatis_report_address(w, cur, "in [ stack tid=%#r ]\n", id);
987
988 if (ulwp->ul_ustack.ss_flags & SS_ONSTACK) {
989 base = (uintptr_t)ulwp->ul_ustack.ss_sp;
990 size = ulwp->ul_ustack.ss_size;
991
992 while (mdb_whatis_match(w, base, size, &cur))
993 mdb_whatis_report_address(w, cur,
994 "in [ altstack tid=%#r ]\n", id);
995 }
996
997 return (WHATIS_WALKRET(w));
998 }
999
1000 /*ARGSUSED*/
1001 static int
1002 whatis_run_ulwps(mdb_whatis_t *w, void *arg)
1003 {
1004 if (mdb_walk("ulwps", (mdb_walk_cb_t)whatis_walk_ulwp, w) == -1) {
1005 mdb_warn("couldn't find ulwps walker");
1006 return (1);
1007 }
1008 return (0);
1009 }
1010
1011 /*
1012 * =======================================================
1013 * End of thread (previously libthread) interfaces.
1014 * ==================== threads ==========================
1015 */
1016
1017 int
1018 stacks_dcmd(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1019 {
1020 int rval = stacks(addr, flags, argc, argv);
1021
1022 /*
1023 * For the user-level variant of ::stacks, we don't bother caching
1024 * state, as even a very large program is unlikely to compare to the
1025 * kernel in terms of number of threads. (And if you find yourself
1026 * here in anger, frustrated about how long ::stacks is running on
1027 * your galactically complicated zillion-thread program, hopefully
1028 * you will find some solace in the irony. Okay, probably not...)
1029 */
1030 stacks_cleanup(B_TRUE);
1031 return (rval);
1032 }
1033
1034 typedef struct tid2ulwp_walk {
1035 lwpid_t t2u_tid;
1036 uintptr_t t2u_lwp;
1037 boolean_t t2u_found;
1038 } tid2ulwp_walk_t;
1039
1040 /*ARGSUSED*/
1041 static int
1042 tid2ulwp_walk(uintptr_t addr, ulwp_t *ulwp, tid2ulwp_walk_t *t2u)
1043 {
1044 if (ulwp->ul_lwpid == t2u->t2u_tid) {
1045 t2u->t2u_lwp = addr;
1046 t2u->t2u_found = B_TRUE;
1047 return (WALK_DONE);
1048 }
1049
1050 return (WALK_NEXT);
1051 }
1052
1053 static int
1054 tid2ulwp_impl(uintptr_t tid_addr, uintptr_t *ulwp_addrp)
1055 {
1056 tid2ulwp_walk_t t2u;
1057
1058 bzero(&t2u, sizeof (t2u));
1059 t2u.t2u_tid = (lwpid_t)tid_addr;
1060
1061 if (mdb_walk("ulwp", (mdb_walk_cb_t)tid2ulwp_walk, &t2u) != 0) {
1062 mdb_warn("can't walk 'ulwp'");
1063 return (DCMD_ERR);
1064 }
1065
1066 if (!t2u.t2u_found) {
1067 mdb_warn("thread ID %d not found", t2u.t2u_tid);
1068 return (DCMD_ERR);
1069 }
1070 *ulwp_addrp = t2u.t2u_lwp;
1071 return (DCMD_OK);
1072 }
1073
1074 /*ARGSUSED*/
1075 static int
1076 tid2ulwp(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1077 {
1078 uintptr_t ulwp_addr;
1079 int error;
1080
1081 if (argc != 0)
1082 return (DCMD_USAGE);
1083
1084 error = tid2ulwp_impl(addr, &ulwp_addr);
1085 if (error == DCMD_OK)
1086 mdb_printf("%p\n", ulwp_addr);
1087 return (error);
1088 }
1089
1090 typedef struct mdb_libc_ulwp {
1091 void *ul_ftsd[TSD_NFAST];
1092 tsd_t *ul_stsd;
1093 } mdb_libc_ulwp_t;
1094
1095 /*
1096 * Map from thread pointer to tsd for given key
1097 */
1098 static int
1099 d_tsd(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1100 {
1101 mdb_libc_ulwp_t u;
1102 uintptr_t ulwp_addr;
1103 uintptr_t key = NULL;
1104 void *element = NULL;
1105
1106 if (mdb_getopts(argc, argv, 'k', MDB_OPT_UINTPTR, &key, NULL) != argc)
1107 return (DCMD_USAGE);
1108
1109 if (!(flags & DCMD_ADDRSPEC) || key == NULL)
1110 return (DCMD_USAGE);
1111
1112 if (tid2ulwp_impl(addr, &ulwp_addr) != DCMD_OK)
1113 return (DCMD_ERR);
1114
1115 if (mdb_ctf_vread(&u, "ulwp_t", "mdb_libc_ulwp_t", ulwp_addr, 0) == -1)
1116 return (DCMD_ERR);
1117
1118 if (key < TSD_NFAST) {
1119 element = u.ul_ftsd[key];
1120 } else if (u.ul_stsd != NULL) {
1121 uint_t nalloc;
1122 /* tsd_t is a union, so we can't use ctf_vread() on it. */
1123 if (mdb_vread(&nalloc, sizeof (nalloc),
1124 (uintptr_t)&u.ul_stsd->tsd_nalloc) == -1) {
1125 mdb_warn("failed to read tsd_t at %p", u.ul_stsd);
1126 return (DCMD_ERR);
1127 }
1128 if (key < nalloc) {
1129 if (mdb_vread(&element, sizeof (element),
1130 (uintptr_t)&u.ul_stsd->tsd_data[key]) == -1) {
1131 mdb_warn("failed to read tsd_t at %p",
1132 u.ul_stsd);
1133 return (DCMD_ERR);
1134 }
1135 }
1136 }
1137
1138 if (element == NULL && (flags & DCMD_PIPE))
1139 return (DCMD_OK);
1140
1141 mdb_printf("%p\n", element);
1142 return (DCMD_OK);
1143 }
1144
1145 static const mdb_dcmd_t dcmds[] = {
1146 { "jmp_buf", ":", "print jmp_buf contents", d_jmp_buf, NULL },
1147 { "sigjmp_buf", ":", "print sigjmp_buf contents", d_sigjmp_buf, NULL },
1148 { "siginfo", ":", "print siginfo_t structure", d_siginfo, NULL },
1149 { "stacks", "?[-afiv] [-c func] [-C func] [-m module] [-M module] ",
1150 "print unique thread stacks", stacks_dcmd, stacks_help },
1151 { "tid2ulwp", "?", "convert TID to ulwp_t address", tid2ulwp },
1152 { "ucontext", ":", "print ucontext_t structure", d_ucontext, NULL },
1153 { "ulwp", ":", "print ulwp_t structure", d_ulwp, NULL },
1154 { "uberdata", ":", "print uberdata_t structure", d_uberdata, NULL },
1155 { "tsd", ":-k key", "print tsd for this thread", d_tsd, NULL },
1156 { NULL }
1157 };
1158
1159 static const mdb_walker_t walkers[] = {
1160 { "ucontext", "walk ucontext_t uc_link list",
1161 NULL, uc_walk_step, NULL, NULL },
1162 { "oldcontext", "walk per-lwp oldcontext pointers",
1163 oldc_walk_init, oldc_walk_step, oldc_walk_fini, NULL },
1164 { "ulwps", "walk list of ulwp_t pointers",
1165 ulwp_walk_init, ulwp_walk_step, NULL, NULL },
1166 { "ulwp", "walk list of ulwp_t pointers",
1167 ulwp_walk_init, ulwp_walk_step, NULL, NULL },
1168 { NULL }
1169 };
1170
1171 static const mdb_modinfo_t modinfo = { MDB_API_VERSION, dcmds, walkers };
1172
1173 const mdb_modinfo_t *
1174 _mdb_init(void)
1175 {
1176 mdb_whatis_register("threads", whatis_run_ulwps, NULL,
1177 WHATIS_PRIO_EARLY, WHATIS_REG_NO_ID);
1178
1179 return (&modinfo);
1180 }