libc.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
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, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*
23 * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27#pragma ident	"%Z%%M%	%I%	%E% SMI"
28
29#include <sys/mdb_modapi.h>
30#include <procfs.h>
31#include <ucontext.h>
32#include <siginfo.h>
33#include <signal.h>
34#include <setjmp.h>
35#include <string.h>
36#include <thr_uberdata.h>
37
38static const char *
39stack_flags(const stack_t *sp)
40{
41	static char buf[32];
42
43	if (sp->ss_flags == 0)
44		(void) strcpy(buf, " 0");
45	else if (sp->ss_flags & ~(SS_ONSTACK | SS_DISABLE))
46		(void) mdb_snprintf(buf, sizeof (buf), " 0x%x", sp->ss_flags);
47	else {
48		buf[0] = '\0';
49		if (sp->ss_flags & SS_ONSTACK)
50			(void) strcat(buf, "|ONSTACK");
51		if (sp->ss_flags & SS_DISABLE)
52			(void) strcat(buf, "|DISABLE");
53	}
54
55	return (buf + 1);
56}
57
58/*ARGSUSED*/
59static int
60d_jmp_buf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
61{
62	jmp_buf jb;
63	const ulong_t *b = (const ulong_t *)jb;
64
65	if (argc != 0)
66		return (DCMD_USAGE);
67
68	if (mdb_vread(&jb, sizeof (jb), addr) != sizeof (jb)) {
69		mdb_warn("failed to read jmp_buf at %p", addr);
70		return (DCMD_ERR);
71	}
72
73#if defined(__sparc)
74	mdb_printf("  %%sp = 0x%lx\n", b[1]);
75	mdb_printf("  %%pc = 0x%lx %lA\n", b[2], b[2]);
76	mdb_printf("  %%fp = 0x%lx\n", b[3]);
77	mdb_printf("  %%i7 = 0x%lx %lA\n", b[4], b[4]);
78#elif defined(__amd64)
79	mdb_printf("  %%rbx = 0x%lx\n", b[0]);
80	mdb_printf("  %%r12 = 0x%lx\n", b[1]);
81	mdb_printf("  %%r13 = 0x%lx\n", b[2]);
82	mdb_printf("  %%r14 = 0x%lx\n", b[3]);
83	mdb_printf("  %%r15 = 0x%lx\n", b[4]);
84	mdb_printf("  %%rbp = 0x%lx\n", b[5]);
85	mdb_printf("  %%rsp = 0x%lx\n", b[6]);
86	mdb_printf("  %%rip = 0x%lx %lA\n", b[7], b[7]);
87#elif defined(__i386)
88	mdb_printf("  %%ebx = 0x%lx\n", b[0]);
89	mdb_printf("  %%esi = 0x%lx\n", b[1]);
90	mdb_printf("  %%edi = 0x%lx\n", b[2]);
91	mdb_printf("  %%ebp = 0x%lx\n", b[3]);
92	mdb_printf("  %%esp = 0x%lx\n", b[4]);
93	mdb_printf("  %%eip = 0x%lx %lA\n", b[5], b[5]);
94#endif
95	return (DCMD_OK);
96}
97
98/*ARGSUSED*/
99static int
100d_ucontext(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
101{
102	ucontext_t uc;
103
104	if (argc != 0)
105		return (DCMD_USAGE);
106
107	if (mdb_vread(&uc, sizeof (uc), addr) != sizeof (uc)) {
108		mdb_warn("failed to read ucontext at %p", addr);
109		return (DCMD_ERR);
110	}
111
112	mdb_printf("  flags    = 0x%lx\n", uc.uc_flags);
113	mdb_printf("  link     = 0x%p\n", uc.uc_link);
114	mdb_printf("  sigmask  = 0x%08x 0x%08x 0x%08x 0x%08x\n",
115	    uc.uc_sigmask.__sigbits[0], uc.uc_sigmask.__sigbits[1],
116	    uc.uc_sigmask.__sigbits[2], uc.uc_sigmask.__sigbits[3]);
117	mdb_printf("  stack    = sp 0x%p size 0x%lx flags %s\n",
118	    uc.uc_stack.ss_sp, uc.uc_stack.ss_size, stack_flags(&uc.uc_stack));
119	mdb_printf("  mcontext = 0x%p\n",
120	    addr + OFFSETOF(ucontext_t, uc_mcontext));
121
122	return (DCMD_OK);
123}
124
125/*ARGSUSED*/
126static int
127d_sigjmp_buf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
128{
129#if defined(__sparc)
130	struct {
131		int sjs_flags;
132		greg_t sjs_sp;
133		greg_t sjs_pc;
134		greg_t sjs_fp;
135		greg_t sjs_i7;
136		ucontext_t *sjs_uclink;
137		ulong_t sjs_pad[_JBLEN - 6];
138		sigset_t sjs_sigmask;
139#if defined(_LP64)
140		ulong_t sjs_pad1[2];
141#endif
142		stack_t sjs_stack;
143	} s;
144
145	if (argc != 0)
146		return (DCMD_USAGE);
147
148	if (mdb_vread(&s, sizeof (s), addr) != sizeof (s)) {
149		mdb_warn("failed to read sigjmp_buf at %p", addr);
150		return (DCMD_ERR);
151	}
152
153	mdb_printf("  flags  = 0x%x\n", s.sjs_flags);
154	mdb_printf("  %%sp    = 0x%lx %lA\n", s.sjs_sp, s.sjs_sp);
155	mdb_printf("  %%pc    = 0x%lx %lA\n", s.sjs_pc, s.sjs_pc);
156	mdb_printf("  %%fp    = 0x%lx %lA\n", s.sjs_fp, s.sjs_fp);
157	mdb_printf("  %%i7    = 0x%lx %lA\n", s.sjs_i7, s.sjs_i7);
158	mdb_printf("  uclink = %p\n", s.sjs_uclink);
159	mdb_printf("  sigset = 0x%08x 0x%08x 0x%08x 0x%08x\n",
160	    s.sjs_sigmask.__sigbits[0], s.sjs_sigmask.__sigbits[1],
161	    s.sjs_sigmask.__sigbits[2], s.sjs_sigmask.__sigbits[3]);
162	mdb_printf("  stack  = sp 0x%p size 0x%lx flags %s\n",
163	    s.sjs_stack.ss_sp, s.sjs_stack.ss_size, stack_flags(&s.sjs_stack));
164
165	return (DCMD_OK);
166
167#elif defined(__i386) || defined(__amd64)
168	return (d_ucontext(addr, flags, argc, argv));
169#endif
170}
171
172/*ARGSUSED*/
173static int
174d_siginfo(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
175{
176	static const char *const msname[] = {
177		"USER", "SYSTEM", "TRAP", "TFAULT", "DFAULT", "KFAULT",
178		"USER_LOCK", "SLEEP", "WAIT_CPU", "STOPPED"
179	};
180
181	char signame[SIG2STR_MAX];
182	siginfo_t si;
183	int i;
184
185	if (argc != 0)
186		return (DCMD_USAGE);
187
188	if (mdb_vread(&si, sizeof (si), addr) != sizeof (si)) {
189		mdb_warn("failed to read siginfo at %p", addr);
190		return (DCMD_ERR);
191	}
192
193	if (sig2str(si.si_signo, signame) == -1)
194		(void) strcpy(signame, "unknown");
195
196	mdb_printf("  signal %5d (%s)\n", si.si_signo, signame);
197	mdb_printf("  code   %5d (", si.si_code);
198
199	switch (si.si_code) {
200	case SI_NOINFO:
201		mdb_printf("no info");
202		break;
203	case SI_DTRACE:
204		mdb_printf("from DTrace raise() action");
205		break;
206	case SI_RCTL:
207		mdb_printf("from rctl action");
208		break;
209	case SI_USER:
210		mdb_printf("user generated via kill");
211		break;
212	case SI_LWP:
213		mdb_printf("user generated via lwp_kill");
214		break;
215	case SI_QUEUE:
216		mdb_printf("user generated via sigqueue");
217		break;
218	case SI_TIMER:
219		mdb_printf("from timer expiration");
220		break;
221	case SI_ASYNCIO:
222		mdb_printf("from async i/o completion");
223		break;
224	case SI_MESGQ:
225		mdb_printf("from message arrival");
226		break;
227	default:
228		if (SI_FROMUSER(&si))
229			mdb_printf("from user process");
230		else
231			mdb_printf("from kernel");
232	}
233
234	mdb_printf(")\n  errno  %5d (%s)\n",
235	    si.si_errno, strerror(si.si_errno));
236
237	if (si.si_code == SI_USER || si.si_code == SI_QUEUE) {
238		mdb_printf("  signal sent from PID %d (uid %d)\n",
239		    si.si_pid, si.si_uid);
240	}
241
242	if (si.si_code == SI_QUEUE) {
243		mdb_printf("  signal value = 0t%d / %p\n",
244		    si.si_value.sival_int, si.si_value.sival_ptr);
245	}
246
247	switch (si.si_signo) {
248	case SIGCLD:
249		mdb_printf("  signal sent from child PID %d (uid %d)\n",
250		    si.si_pid, si.si_uid);
251		mdb_printf("  usr time = 0t%ld ticks, sys time = 0t%ld ticks\n",
252		    si.si_utime, si.si_stime);
253		mdb_printf("  wait status = 0x%x\n", si.si_status);
254		break;
255
256	case SIGSEGV:
257	case SIGBUS:
258	case SIGILL:
259	case SIGTRAP:
260	case SIGFPE:
261		mdb_printf("  fault address = 0x%p\n  trapno = %d\n",
262		    si.si_addr, si.si_trapno);
263		mdb_printf("  instruction address = 0x%p %lA\n",
264		    si.si_pc, si.si_pc);
265		break;
266
267	case SIGPOLL:
268	case SIGXFSZ:
269		mdb_printf("  fd = %d  band = 0x%lx\n",
270		    si.si_fd, si.si_band);
271		break;
272
273	case SIGPROF:
274		mdb_printf("  last fault address = 0x%p fault type = %d\n",
275		    si.si_faddr, si.si_fault);
276		mdb_printf("  timestamp = 0t%ld sec 0t%ld nsec\n",
277		    si.si_tstamp.tv_sec, si.si_tstamp.tv_nsec);
278
279		if (si.__data.__prof.__syscall != 0) {
280			mdb_printf("  system call %d (", si.si_syscall);
281			if (si.si_nsysarg > 0) {
282				mdb_printf("%lx", si.si_sysarg[0]);
283				for (i = 1; i < si.si_nsysarg; i++)
284					mdb_printf(", %lx", si.si_sysarg[i]);
285			}
286			mdb_printf("  )\n");
287		}
288
289		for (i = 0; i < sizeof (msname) / sizeof (msname[0]); i++) {
290			mdb_printf("  mstate[\"%s\"] = %d\n",
291			    msname[i], si.si_mstate[i]);
292		}
293		break;
294	}
295
296	return (DCMD_OK);
297}
298
299static int
300uc_walk_step(mdb_walk_state_t *wsp)
301{
302	uintptr_t addr = wsp->walk_addr;
303	ucontext_t uc;
304
305	if (addr == NULL)
306		return (WALK_DONE);
307
308	if (mdb_vread(&uc, sizeof (uc), addr) != sizeof (uc)) {
309		mdb_warn("failed to read ucontext at %p", addr);
310		return (WALK_ERR);
311	}
312
313	wsp->walk_addr = (uintptr_t)uc.uc_link;
314	return (wsp->walk_callback(addr, &uc, wsp->walk_cbdata));
315}
316
317static int
318oldc_walk_init(mdb_walk_state_t *wsp)
319{
320	ssize_t nbytes = mdb_get_xdata("lwpstatus", NULL, 0);
321
322	if (nbytes <= 0) {
323		mdb_warn("lwpstatus information not available");
324		return (WALK_ERR);
325	}
326
327	if (wsp->walk_addr != NULL) {
328		mdb_warn("walker only supports global walk\n");
329		return (WALK_ERR);
330	}
331
332	wsp->walk_addr = nbytes; /* Use walk_addr to track size */
333	wsp->walk_data = mdb_alloc(nbytes, UM_SLEEP);
334
335	if (mdb_get_xdata("lwpstatus", wsp->walk_data, nbytes) != nbytes) {
336		mdb_warn("failed to read lwpstatus information");
337		mdb_free(wsp->walk_data, nbytes);
338		return (WALK_ERR);
339	}
340
341	wsp->walk_arg = wsp->walk_data; /* Use walk_arg to track pointer */
342	return (WALK_NEXT);
343}
344
345static int
346oldc_walk_step(mdb_walk_state_t *wsp)
347{
348	const lwpstatus_t *lsp, *end;
349
350	end = (const lwpstatus_t *)((uintptr_t)wsp->walk_data + wsp->walk_addr);
351	lsp = wsp->walk_arg;
352
353	wsp->walk_arg = (void *)(lsp + 1);
354
355	if (lsp < end) {
356		uintptr_t addr = lsp->pr_oldcontext;
357		ucontext_t uc;
358
359		if (addr == NULL)
360			return (WALK_NEXT);
361
362		if (mdb_vread(&uc, sizeof (uc), addr) != sizeof (uc)) {
363			mdb_warn("failed to read ucontext at %p", addr);
364			return (WALK_NEXT);
365		}
366
367		return (wsp->walk_callback(addr, &uc, wsp->walk_cbdata));
368	}
369
370	return (WALK_DONE);
371}
372
373static void
374oldc_walk_fini(mdb_walk_state_t *wsp)
375{
376	mdb_free(wsp->walk_data, wsp->walk_addr); /* walk_addr has size */
377}
378
379/*
380 * ==================== threads ==========================
381 * These are the interfaces that used to require libthread.
382 * Now, libthread has been folded into libc.
383 * =======================================================
384 */
385
386/*
387 * prt_addr() is called up to three times to generate arguments for
388 * one call to mdb_printf().  We must return at least three different
389 * pointers to static storage for consecutive calls to prt_addr().
390 */
391static const char *
392prt_addr(void *addr, int pad)
393{
394	static char buffer[4][24];
395	static int ix = 0;
396	char *buf;
397
398	if (ix == 4)	/* use buffers in sequence: 0, 1, 2, 3 */
399		ix = 0;
400	buf = buffer[ix++];
401	if (addr == NULL)
402		return (pad? "<NULL>               " : "<NULL>");
403	else {
404#ifdef _LP64
405		(void) mdb_snprintf(buf, sizeof (buffer[0]), "0x%016lx", addr);
406		if (pad)
407			(void) strcpy(buf + 18, "   ");
408#else
409		(void) mdb_snprintf(buf, sizeof (buffer[0]), "0x%08lx", addr);
410		if (pad)
411			(void) strcpy(buf + 10, "           ");
412#endif	/* _LP64 */
413		return (buf);
414	}
415}
416
417#define	HD(str)		mdb_printf("           " str "\n")
418#define	OFFSTR		"+0x%-7lx "
419#define	OFFSET(member)	((size_t)OFFSETOF(ulwp_t, member))
420
421/*ARGSUSED*/
422static int
423d_ulwp(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
424{
425	ulwp_t ulwp;
426
427	if (argc != 0 || !(flags & DCMD_ADDRSPEC))
428		return (DCMD_USAGE);
429
430	if (mdb_vread(&ulwp, sizeof (ulwp), addr) != sizeof (ulwp) &&
431	    (bzero(&ulwp, sizeof (ulwp)),
432	    mdb_vread(&ulwp, REPLACEMENT_SIZE, addr)) != REPLACEMENT_SIZE) {
433		mdb_warn("failed to read ulwp at 0x%p", addr);
434		return (DCMD_ERR);
435	}
436
437	mdb_printf("%#a\n", addr);
438
439	HD("self                  uberdata");
440	mdb_printf(OFFSTR "%s %s\n",
441		OFFSET(ul_self),
442		prt_addr(ulwp.ul_self, 1),
443		prt_addr(ulwp.ul_uberdata, 0));
444
445	HD("tlsent                ntlsent");
446	mdb_printf(OFFSTR "%s %ld\n",
447		OFFSET(ul_tlsent),
448		prt_addr(ulwp.ul_tlsent, 1),
449		ulwp.ul_ntlsent);
450
451	HD("forw                  back                  next");
452	mdb_printf(OFFSTR "%s %s %s\n",
453		OFFSET(ul_forw),
454		prt_addr(ulwp.ul_forw, 1),
455		prt_addr(ulwp.ul_back, 1),
456		prt_addr(ulwp.ul_next, 0));
457
458	HD("hash                  rval                  stk");
459	mdb_printf(OFFSTR "%s %s %s\n",
460		OFFSET(ul_hash),
461		prt_addr(ulwp.ul_hash, 1),
462		prt_addr(ulwp.ul_rval, 1),
463		prt_addr(ulwp.ul_stk, 0));
464
465	HD("mapsiz     guardsize  stktop                stksiz");
466	mdb_printf(OFFSTR "%-10ld %-10ld %s %ld\n",
467		OFFSET(ul_mapsiz),
468		ulwp.ul_mapsiz,
469		ulwp.ul_guardsize,
470		prt_addr((void *)ulwp.ul_stktop, 1),
471		ulwp.ul_stksiz);
472
473	HD("ustack.ss_sp          ustack.ss_size        ustack.ss_flags");
474	mdb_printf(OFFSTR "%s %-21ld %s\n",
475		OFFSET(ul_ustack.ss_sp),
476		prt_addr(ulwp.ul_ustack.ss_sp, 1),
477		ulwp.ul_ustack.ss_size,
478		stack_flags(&ulwp.ul_ustack));
479
480	HD("ix         lwpid      pri        mappedpri  policy     pri_mapped");
481	mdb_printf(OFFSTR "%-10d %-10d %-10d %-10d %-10d %d\n",
482		OFFSET(ul_ix),
483		ulwp.ul_ix,
484		ulwp.ul_lwpid,
485		ulwp.ul_pri,
486		ulwp.ul_mappedpri,
487		ulwp.ul_policy,
488		ulwp.ul_pri_mapped);
489
490	HD("cursig     pleasestop stop       signalled  dead       unwind");
491	mdb_printf(OFFSTR "%-10d ",
492		OFFSET(ul_cursig),
493		ulwp.ul_cursig);
494	mdb_printf(ulwp.ul_pleasestop? "0x%-8x " : "%-10d ",
495		ulwp.ul_pleasestop);
496	mdb_printf(ulwp.ul_stop? "0x%-8x " : "%-10d ",
497		ulwp.ul_stop);
498	mdb_printf("%-10d %-10d %d\n",
499		ulwp.ul_signalled,
500		ulwp.ul_dead,
501		ulwp.ul_unwind);
502
503	HD("detached   writer     stopping   pad4       preempt    savpreempt");
504	mdb_printf(OFFSTR "%-10d %-10d %-10d %-10d %-10d %d\n",
505		OFFSET(ul_detached),
506		ulwp.ul_detached,
507		ulwp.ul_writer,
508		ulwp.ul_stopping,
509		ulwp.ul_pad4,
510		ulwp.ul_preempt,
511		ulwp.ul_savpreempt);
512
513	HD("sigsuspend main       fork       primarymap m'spinners d'noreserv");
514	mdb_printf(OFFSTR "%-10d %-10d %-10d %-10d %-10d %d\n",
515		OFFSET(ul_sigsuspend),
516		ulwp.ul_sigsuspend,
517		ulwp.ul_main,
518		ulwp.ul_fork,
519		ulwp.ul_primarymap,
520		ulwp.ul_max_spinners,
521		ulwp.ul_door_noreserve);
522
523	HD("queue_fifo c'w'defer  e'detect'  async_safe pad1[0]    pad1[1]");
524	mdb_printf(OFFSTR "%-10d %-10d %-10d %-10d %-10d %d\n",
525		OFFSET(ul_queue_fifo),
526		ulwp.ul_queue_fifo,
527		ulwp.ul_cond_wait_defer,
528		ulwp.ul_error_detection,
529		ulwp.ul_async_safe,
530		ulwp.ul_pad1[0],
531		ulwp.ul_pad1[1]);
532
533	HD("adapt'spin rele'spin  queue_spin critical   sigdefer   vfork");
534	mdb_printf(OFFSTR "%-10d %-10d %-10d %-10d %-10d %d\n",
535		OFFSET(ul_adaptive_spin),
536		ulwp.ul_adaptive_spin,
537		ulwp.ul_release_spin,
538		ulwp.ul_queue_spin,
539		ulwp.ul_critical,
540		ulwp.ul_sigdefer,
541		ulwp.ul_vfork);
542
543	HD("cancelable c'pending  c'disabled c'async    save_async mutator");
544	mdb_printf(OFFSTR "%-10d %-10d %-10d %-10d %-10d %d\n",
545		OFFSET(ul_cancelable),
546		ulwp.ul_cancelable,
547		ulwp.ul_cancel_pending,
548		ulwp.ul_cancel_disabled,
549		ulwp.ul_cancel_async,
550		ulwp.ul_save_async,
551		ulwp.ul_mutator);
552
553	HD("created    replace    nocancel   errno      errnop");
554	mdb_printf(OFFSTR "%-10d %-10d %-10d %-10d %s\n",
555		OFFSET(ul_created),
556		ulwp.ul_created,
557		ulwp.ul_replace,
558		ulwp.ul_nocancel,
559		ulwp.ul_errno,
560		prt_addr(ulwp.ul_errnop, 0));
561
562	HD("clnup_hdr             schedctl_called       schedctl");
563	mdb_printf(OFFSTR "%s %s %s\n",
564		OFFSET(ul_clnup_hdr),
565		prt_addr(ulwp.ul_clnup_hdr, 1),
566		prt_addr(ulwp.ul_schedctl_called, 1),
567		prt_addr((void *)ulwp.ul_schedctl, 0));
568
569	HD("bindflags  gs         stsd                  &ftsd");
570	mdb_printf(OFFSTR,
571		OFFSET(ul_bindflags));
572	mdb_printf(ulwp.ul_bindflags? "0x%-8x " : "%-10d ",
573		ulwp.ul_bindflags);
574	mdb_printf(ulwp.ul_gs? "0x%-8x " : "%-10d ",
575		ulwp.ul_gs);
576	mdb_printf("%s %s\n",
577		prt_addr(ulwp.ul_stsd, 1),
578		prt_addr((void *)(addr + OFFSET(ul_ftsd[0])), 0));
579
580	HD("eventmask[0..1]       eventnum              eventdata");
581	mdb_printf(OFFSTR "0x%08x 0x%08x %-21d %s\n",
582		OFFSET(ul_td_evbuf.eventmask.event_bits[0]),
583		ulwp.ul_td_evbuf.eventmask.event_bits[0],
584		ulwp.ul_td_evbuf.eventmask.event_bits[1],
585		ulwp.ul_td_evbuf.eventnum,
586		prt_addr(ulwp.ul_td_evbuf.eventdata, 0));
587
588	HD("td'enable  sync'reg   qtype      cv_wake    usropts");
589	mdb_printf(OFFSTR "%-10d %-10d %-10d %-10d ",
590		OFFSET(ul_td_events_enable),
591		ulwp.ul_td_events_enable,
592		ulwp.ul_sync_obj_reg,
593		ulwp.ul_qtype,
594		ulwp.ul_cv_wake);
595	mdb_printf(ulwp.ul_usropts? "0x%x\n" : "%d\n",
596		ulwp.ul_usropts);
597
598	HD("startpc               startarg              wchan");
599	mdb_printf(OFFSTR "%s %s %s\n",
600		OFFSET(ul_startpc),
601		prt_addr((void *)ulwp.ul_startpc, 1),
602		prt_addr(ulwp.ul_startarg, 1),
603		prt_addr(ulwp.ul_wchan, 0));
604
605	HD("link                  sleepq                cvmutex");
606	mdb_printf(OFFSTR "%s %s %s\n",
607		OFFSET(ul_link),
608		prt_addr(ulwp.ul_link, 1),
609		prt_addr(ulwp.ul_sleepq, 1),
610		prt_addr(ulwp.ul_cvmutex, 0));
611
612	HD("mxchain               epri       emappedpri rdlocks");
613	mdb_printf(OFFSTR "%s %-10d %-10d %d\n",
614		OFFSET(ul_mxchain),
615		prt_addr(ulwp.ul_mxchain, 1),
616		ulwp.ul_epri,
617		ulwp.ul_emappedpri,
618		ulwp.ul_rdlocks);
619
620	HD("rd_rwlock             rd_count              tpdp");
621	mdb_printf(OFFSTR "%s %-21ld %s\n",
622		OFFSET(ul_readlock.single.rd_rwlock),
623		prt_addr(ulwp.ul_readlock.single.rd_rwlock, 1),
624		ulwp.ul_readlock.single.rd_count,
625		prt_addr(ulwp.ul_tpdp, 0));
626
627	HD("siglink               s'l'spin   s'l'spin2  s'l'sleep  s'l'wakeup");
628	mdb_printf(OFFSTR "%s %-10d %-10d %-10d %-10d\n",
629		OFFSET(ul_siglink),
630		prt_addr(ulwp.ul_siglink, 1),
631		ulwp.ul_spin_lock_spin,
632		ulwp.ul_spin_lock_spin2,
633		ulwp.ul_spin_lock_sleep,
634		ulwp.ul_spin_lock_wakeup);
635
636	/*
637	 * The remainder of the ulwp_t structure
638	 * is invalid if this is a replacement.
639	 */
640	if (ulwp.ul_replace)
641		return (DCMD_OK);
642
643	HD("sigmask[0..3]");
644	mdb_printf(OFFSTR "0x%08x 0x%08x 0x%08x 0x%08x\n",
645		OFFSET(ul_sigmask.__sigbits[0]),
646		ulwp.ul_sigmask.__sigbits[0],
647		ulwp.ul_sigmask.__sigbits[1],
648		ulwp.ul_sigmask.__sigbits[2],
649		ulwp.ul_sigmask.__sigbits[3]);
650
651	HD("tmpmask[0..3]");
652	mdb_printf(OFFSTR "0x%08x 0x%08x 0x%08x 0x%08x\n",
653		OFFSET(ul_tmpmask.__sigbits[0]),
654		ulwp.ul_tmpmask.__sigbits[0],
655		ulwp.ul_tmpmask.__sigbits[1],
656		ulwp.ul_tmpmask.__sigbits[2],
657		ulwp.ul_tmpmask.__sigbits[3]);
658
659	HD("&siginfo              &spinlock             &fpuenv");
660	mdb_printf(OFFSTR "%s %s %s\n",
661		OFFSET(ul_siginfo),
662		prt_addr((void *)(addr + OFFSET(ul_siginfo)), 1),
663		prt_addr((void *)(addr + OFFSET(ul_spinlock)), 1),
664		prt_addr((void *)(addr + OFFSET(ul_fpuenv)), 0));
665
666	return (DCMD_OK);
667}
668
669/*
670 * Get the address of the unique uberdata_t structure.
671 */
672static uintptr_t
673uberdata_addr(void)
674{
675	uintptr_t uaddr;
676	uintptr_t addr;
677	GElf_Sym sym;
678
679	if (mdb_lookup_by_obj("libc.so.1", "_tdb_bootstrap", &sym) != 0) {
680		mdb_warn("cannot find libc.so.1`_tdb_bootstrap");
681		return (NULL);
682	}
683	if (mdb_vread(&addr, sizeof (addr), sym.st_value) == sizeof (addr) &&
684	    addr != NULL &&
685	    mdb_vread(&uaddr, sizeof (uaddr), addr) == sizeof (uaddr) &&
686	    uaddr != NULL) {
687		return (uaddr);
688	}
689	if (mdb_lookup_by_obj("libc.so.1", "_uberdata", &sym) != 0) {
690		mdb_warn("cannot find libc.so.1`_uberdata");
691		return (NULL);
692	}
693	return ((uintptr_t)sym.st_value);
694}
695
696#undef OFFSET
697#define	OFFSET(member)	((size_t)OFFSETOF(uberdata_t, member))
698
699/*ARGSUSED*/
700static int
701d_uberdata(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
702{
703	uberdata_t uberdata;
704	int i;
705
706	if (argc != 0)
707		return (DCMD_USAGE);
708	if (!(flags & DCMD_ADDRSPEC) && (addr = uberdata_addr()) == NULL)
709		return (DCMD_ERR);
710
711	if (mdb_vread(&uberdata, sizeof (uberdata), addr) !=
712	    sizeof (uberdata)) {
713		mdb_warn("failed to read uberdata at 0x%p", addr);
714		return (DCMD_ERR);
715	}
716
717	mdb_printf("%#a\n", addr);
718
719	HD("&link_lock            &fork_lock            fork_owner");
720	mdb_printf(OFFSTR "%s %s %s\n",
721		OFFSET(link_lock),
722		prt_addr((void *)(addr + OFFSET(link_lock)), 1),
723		prt_addr((void *)(addr + OFFSET(fork_lock)), 1),
724		prt_addr((void *)uberdata.fork_owner, 0));
725
726	HD("&tdb_hash_lock        &tdb_hash_lock_stats  &siguaction[0]");
727	mdb_printf(OFFSTR "%s %s %s\n",
728		OFFSET(tdb_hash_lock),
729		prt_addr((void *)(addr + OFFSET(tdb_hash_lock)), 1),
730		prt_addr((void *)(addr + OFFSET(tdb_hash_lock_stats)), 1),
731		prt_addr((void *)(addr + OFFSET(siguaction)), 0));
732
733	HD("&bucket               free_list             chunks");
734	for (i = 0; i < NBUCKETS; i++) {
735		mdb_printf(OFFSTR "%s %s %ld\n",
736			OFFSET(bucket[i]),
737			prt_addr((void *)(addr + OFFSET(bucket[i])), 1),
738			prt_addr(uberdata.bucket[i].free_list, 1),
739			uberdata.bucket[i].chunks);
740	}
741
742	HD("&atexit_root          head                  exit_frame_monitor");
743	mdb_printf(OFFSTR "%s %s %s\n",
744		OFFSET(atexit_root),
745		prt_addr((void *)(addr + OFFSET(atexit_root.exitfns_lock)), 1),
746		prt_addr(uberdata.atexit_root.head, 1),
747		prt_addr(uberdata.atexit_root.exit_frame_monitor, 0));
748
749	HD("&tsd_metadata         tsdm_nkeys tsdm_nused tsdm_destro");
750	mdb_printf(OFFSTR "%s %-10d %-10d %s\n",
751		OFFSET(tsd_metadata),
752		prt_addr((void *)(addr + OFFSET(tsd_metadata.tsdm_lock)), 1),
753		uberdata.tsd_metadata.tsdm_nkeys,
754		uberdata.tsd_metadata.tsdm_nused,
755		prt_addr((void *)uberdata.tsd_metadata.tsdm_destro, 0));
756
757	HD("&tls_metadata         tls_modinfo.data      tls_modinfo.size");
758	mdb_printf(OFFSTR "%s %s %ld\n",
759		OFFSET(tls_metadata),
760		prt_addr((void *)(addr + OFFSET(tls_metadata.tls_lock)), 1),
761		prt_addr(uberdata.tls_metadata.tls_modinfo.tls_data, 1),
762		uberdata.tls_metadata.tls_modinfo.tls_size);
763
764	HD("                      static_tls.data       static_tls.size");
765	mdb_printf(OFFSTR "%s %s %ld\n",
766		OFFSET(tls_metadata.static_tls),
767		"                     ",
768		prt_addr(uberdata.tls_metadata.static_tls.tls_data, 1),
769		uberdata.tls_metadata.static_tls.tls_size);
770
771	HD("primary_ma bucket_ini uflags.mt  uflags.pad uflags.trs uflags.ted");
772	mdb_printf(OFFSTR "%-10d %-10d %-10d %-10d %-10d %d\n",
773		OFFSET(primary_map),
774		uberdata.primary_map,
775		uberdata.bucket_init,
776		uberdata.uberflags.uf_x.x_mt,
777		uberdata.uberflags.uf_x.x_pad,
778		uberdata.uberflags.uf_x.x_tdb_register_sync,
779		uberdata.uberflags.uf_x.x_thread_error_detection);
780
781	HD("queue_head            thr_hash_table        hash_size  hash_mask");
782	mdb_printf(OFFSTR "%s %s %-10d 0x%x\n",
783		OFFSET(queue_head),
784		prt_addr(uberdata.queue_head, 1),
785		prt_addr(uberdata.thr_hash_table, 1),
786		uberdata.hash_size,
787		uberdata.hash_mask);
788
789	HD("ulwp_one              all_lwps              all_zombies");
790	mdb_printf(OFFSTR "%s %s %s\n",
791		OFFSET(ulwp_one),
792		prt_addr(uberdata.ulwp_one, 1),
793		prt_addr(uberdata.all_lwps, 1),
794		prt_addr(uberdata.all_zombies, 0));
795
796	HD("nthreads   nzombies   ndaemons   pid        sigacthandler");
797	mdb_printf(OFFSTR "%-10d %-10d %-10d %-10d %s\n",
798		OFFSET(nthreads),
799		uberdata.nthreads,
800		uberdata.nzombies,
801		uberdata.ndaemons,
802		(int)uberdata.pid,
803		prt_addr((void *)uberdata.sigacthandler, 0));
804
805	HD("lwp_stacks            lwp_laststack         nfreestack stk_cache");
806	mdb_printf(OFFSTR "%s %s %-10d %d\n",
807		OFFSET(lwp_stacks),
808		prt_addr(uberdata.lwp_stacks, 1),
809		prt_addr(uberdata.lwp_laststack, 1),
810		uberdata.nfreestack,
811		uberdata.thread_stack_cache);
812
813	HD("ulwp_freelist         ulwp_lastfree");
814	mdb_printf(OFFSTR "%s %s\n",
815		OFFSET(ulwp_freelist),
816		prt_addr(uberdata.ulwp_freelist, 1),
817		prt_addr(uberdata.ulwp_lastfree, 0));
818
819	HD("ulwp_replace_free     ulwp_replace_last     atforklist");
820	mdb_printf(OFFSTR "%s %s %s\n",
821		OFFSET(ulwp_replace_free),
822		prt_addr(uberdata.ulwp_replace_free, 1),
823		prt_addr(uberdata.ulwp_replace_last, 1),
824		prt_addr(uberdata.atforklist, 0));
825
826	HD("tdb_bootstrap         tdb_sync_addr_hash    tdb_'count tdb_'fail");
827	mdb_printf(OFFSTR "%s %s %-10d %d\n",
828		OFFSET(tdb_bootstrap),
829		prt_addr(uberdata.tdb_bootstrap, 1),
830		prt_addr(uberdata.tdb.tdb_sync_addr_hash, 1),
831		uberdata.tdb.tdb_register_count,
832		uberdata.tdb.tdb_hash_alloc_failed);
833
834	HD("tdb_sync_addr_free    tdb_sync_addr_last    tdb_sync_alloc");
835	mdb_printf(OFFSTR "%s %s %ld\n",
836		OFFSET(tdb.tdb_sync_addr_free),
837		prt_addr(uberdata.tdb.tdb_sync_addr_free, 1),
838		prt_addr(uberdata.tdb.tdb_sync_addr_last, 1),
839		uberdata.tdb.tdb_sync_alloc);
840
841	HD("tdb_ev_global_mask    tdb_events");
842	mdb_printf(OFFSTR "0x%08x 0x%08x %s\n",
843		OFFSET(tdb.tdb_ev_global_mask),
844		uberdata.tdb.tdb_ev_global_mask.event_bits[0],
845		uberdata.tdb.tdb_ev_global_mask.event_bits[1],
846		prt_addr((void *)uberdata.tdb.tdb_events, 0));
847
848	return (DCMD_OK);
849}
850
851static int
852ulwp_walk_init(mdb_walk_state_t *wsp)
853{
854	uintptr_t addr = wsp->walk_addr;
855	uintptr_t uber_addr;
856
857	if (addr == NULL &&
858	    ((uber_addr = uberdata_addr()) == NULL ||
859	    mdb_vread(&addr, sizeof (addr),
860	    uber_addr + OFFSETOF(uberdata_t, all_lwps))
861	    != sizeof (addr))) {
862		mdb_warn("cannot find 'uberdata.all_lwps'");
863		return (WALK_ERR);
864	}
865	if (addr == NULL)
866		return (WALK_DONE);
867	wsp->walk_addr = addr;
868	wsp->walk_data = (void *)addr;
869	return (WALK_NEXT);
870}
871
872static int
873ulwp_walk_step(mdb_walk_state_t *wsp)
874{
875	uintptr_t addr = wsp->walk_addr;
876	ulwp_t ulwp;
877
878	if (addr == NULL)
879		return (WALK_DONE);
880	if (mdb_vread(&ulwp, sizeof (ulwp), addr) != sizeof (ulwp) &&
881	    (bzero(&ulwp, sizeof (ulwp)),
882	    mdb_vread(&ulwp, REPLACEMENT_SIZE, addr)) != REPLACEMENT_SIZE) {
883		mdb_warn("failed to read ulwp at 0x%p", addr);
884		return (WALK_ERR);
885	}
886	/*
887	 * If we have looped around to the beginning
888	 * of the circular linked list, we are done.
889	 */
890	if ((wsp->walk_addr = (uintptr_t)ulwp.ul_forw)
891	    == (uintptr_t)wsp->walk_data)
892		wsp->walk_addr = NULL;
893	return (wsp->walk_callback(addr, &ulwp, wsp->walk_cbdata));
894}
895
896/*
897 * =======================================================
898 * End of thread (previously libthread) interfaces.
899 * ==================== threads ==========================
900 */
901
902static const mdb_dcmd_t dcmds[] = {
903	{ "jmp_buf", ":", "print jmp_buf contents", d_jmp_buf, NULL },
904	{ "sigjmp_buf", ":", "print sigjmp_buf contents", d_sigjmp_buf, NULL },
905	{ "siginfo", ":", "print siginfo_t structure", d_siginfo, NULL },
906	{ "ucontext", ":", "print ucontext_t structure", d_ucontext, NULL },
907	{ "ulwp", ":", "print ulwp_t structure", d_ulwp, NULL },
908	{ "uberdata", ":", "print uberdata_t structure", d_uberdata, NULL },
909	{ NULL }
910};
911
912static const mdb_walker_t walkers[] = {
913	{ "ucontext", "walk ucontext_t uc_link list",
914		NULL, uc_walk_step, NULL, NULL },
915	{ "oldcontext", "walk per-lwp oldcontext pointers",
916		oldc_walk_init, oldc_walk_step, oldc_walk_fini, NULL },
917	{ "ulwps", "walk list of ulwp_t pointers",
918		ulwp_walk_init, ulwp_walk_step, NULL, NULL },
919	{ NULL }
920};
921
922static const mdb_modinfo_t modinfo = { MDB_API_VERSION, dcmds, walkers };
923
924const mdb_modinfo_t *
925_mdb_init(void)
926{
927	return (&modinfo);
928}
929