libc.c revision 09ce0d4acf1a79c720d7e54b60e87cbfa0f1b2d6
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 2009 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27#include <sys/mdb_modapi.h>
28#include <procfs.h>
29#include <ucontext.h>
30#include <siginfo.h>
31#include <signal.h>
32#include <setjmp.h>
33#include <string.h>
34#include <thr_uberdata.h>
35
36static const char *
37stack_flags(const stack_t *sp)
38{
39	static char buf[32];
40
41	if (sp->ss_flags == 0)
42		(void) strcpy(buf, " 0");
43	else if (sp->ss_flags & ~(SS_ONSTACK | SS_DISABLE))
44		(void) mdb_snprintf(buf, sizeof (buf), " 0x%x", sp->ss_flags);
45	else {
46		buf[0] = '\0';
47		if (sp->ss_flags & SS_ONSTACK)
48			(void) strcat(buf, "|ONSTACK");
49		if (sp->ss_flags & SS_DISABLE)
50			(void) strcat(buf, "|DISABLE");
51	}
52
53	return (buf + 1);
54}
55
56/*ARGSUSED*/
57static int
58d_jmp_buf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
59{
60	jmp_buf jb;
61	const ulong_t *b = (const ulong_t *)jb;
62
63	if (argc != 0)
64		return (DCMD_USAGE);
65
66	if (mdb_vread(&jb, sizeof (jb), addr) != sizeof (jb)) {
67		mdb_warn("failed to read jmp_buf at %p", addr);
68		return (DCMD_ERR);
69	}
70
71#if defined(__sparc)
72	mdb_printf("  %%sp = 0x%lx\n", b[1]);
73	mdb_printf("  %%pc = 0x%lx %lA\n", b[2], b[2]);
74	mdb_printf("  %%fp = 0x%lx\n", b[3]);
75	mdb_printf("  %%i7 = 0x%lx %lA\n", b[4], b[4]);
76#elif defined(__amd64)
77	mdb_printf("  %%rbx = 0x%lx\n", b[0]);
78	mdb_printf("  %%r12 = 0x%lx\n", b[1]);
79	mdb_printf("  %%r13 = 0x%lx\n", b[2]);
80	mdb_printf("  %%r14 = 0x%lx\n", b[3]);
81	mdb_printf("  %%r15 = 0x%lx\n", b[4]);
82	mdb_printf("  %%rbp = 0x%lx\n", b[5]);
83	mdb_printf("  %%rsp = 0x%lx\n", b[6]);
84	mdb_printf("  %%rip = 0x%lx %lA\n", b[7], b[7]);
85#elif defined(__i386)
86	mdb_printf("  %%ebx = 0x%lx\n", b[0]);
87	mdb_printf("  %%esi = 0x%lx\n", b[1]);
88	mdb_printf("  %%edi = 0x%lx\n", b[2]);
89	mdb_printf("  %%ebp = 0x%lx\n", b[3]);
90	mdb_printf("  %%esp = 0x%lx\n", b[4]);
91	mdb_printf("  %%eip = 0x%lx %lA\n", b[5], b[5]);
92#endif
93	return (DCMD_OK);
94}
95
96/*ARGSUSED*/
97static int
98d_ucontext(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
99{
100	ucontext_t uc;
101
102	if (argc != 0)
103		return (DCMD_USAGE);
104
105	if (mdb_vread(&uc, sizeof (uc), addr) != sizeof (uc)) {
106		mdb_warn("failed to read ucontext at %p", addr);
107		return (DCMD_ERR);
108	}
109
110	mdb_printf("  flags    = 0x%lx\n", uc.uc_flags);
111	mdb_printf("  link     = 0x%p\n", uc.uc_link);
112	mdb_printf("  sigmask  = 0x%08x 0x%08x 0x%08x 0x%08x\n",
113	    uc.uc_sigmask.__sigbits[0], uc.uc_sigmask.__sigbits[1],
114	    uc.uc_sigmask.__sigbits[2], uc.uc_sigmask.__sigbits[3]);
115	mdb_printf("  stack    = sp 0x%p size 0x%lx flags %s\n",
116	    uc.uc_stack.ss_sp, uc.uc_stack.ss_size, stack_flags(&uc.uc_stack));
117	mdb_printf("  mcontext = 0x%p\n",
118	    addr + OFFSETOF(ucontext_t, uc_mcontext));
119
120	return (DCMD_OK);
121}
122
123/*ARGSUSED*/
124static int
125d_sigjmp_buf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
126{
127#if defined(__sparc)
128	struct {
129		int sjs_flags;
130		greg_t sjs_sp;
131		greg_t sjs_pc;
132		greg_t sjs_fp;
133		greg_t sjs_i7;
134		ucontext_t *sjs_uclink;
135		ulong_t sjs_pad[_JBLEN - 6];
136		sigset_t sjs_sigmask;
137#if defined(_LP64)
138		ulong_t sjs_pad1[2];
139#endif
140		stack_t sjs_stack;
141	} s;
142
143	if (argc != 0)
144		return (DCMD_USAGE);
145
146	if (mdb_vread(&s, sizeof (s), addr) != sizeof (s)) {
147		mdb_warn("failed to read sigjmp_buf at %p", addr);
148		return (DCMD_ERR);
149	}
150
151	mdb_printf("  flags  = 0x%x\n", s.sjs_flags);
152	mdb_printf("  %%sp    = 0x%lx %lA\n", s.sjs_sp, s.sjs_sp);
153	mdb_printf("  %%pc    = 0x%lx %lA\n", s.sjs_pc, s.sjs_pc);
154	mdb_printf("  %%fp    = 0x%lx %lA\n", s.sjs_fp, s.sjs_fp);
155	mdb_printf("  %%i7    = 0x%lx %lA\n", s.sjs_i7, s.sjs_i7);
156	mdb_printf("  uclink = %p\n", s.sjs_uclink);
157	mdb_printf("  sigset = 0x%08x 0x%08x 0x%08x 0x%08x\n",
158	    s.sjs_sigmask.__sigbits[0], s.sjs_sigmask.__sigbits[1],
159	    s.sjs_sigmask.__sigbits[2], s.sjs_sigmask.__sigbits[3]);
160	mdb_printf("  stack  = sp 0x%p size 0x%lx flags %s\n",
161	    s.sjs_stack.ss_sp, s.sjs_stack.ss_size, stack_flags(&s.sjs_stack));
162
163	return (DCMD_OK);
164
165#elif defined(__i386) || defined(__amd64)
166	return (d_ucontext(addr, flags, argc, argv));
167#endif
168}
169
170/*ARGSUSED*/
171static int
172d_siginfo(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
173{
174	static const char *const msname[] = {
175		"USER", "SYSTEM", "TRAP", "TFAULT", "DFAULT", "KFAULT",
176		"USER_LOCK", "SLEEP", "WAIT_CPU", "STOPPED"
177	};
178
179	char signame[SIG2STR_MAX];
180	siginfo_t si;
181	int i;
182
183	if (argc != 0)
184		return (DCMD_USAGE);
185
186	if (mdb_vread(&si, sizeof (si), addr) != sizeof (si)) {
187		mdb_warn("failed to read siginfo at %p", addr);
188		return (DCMD_ERR);
189	}
190
191	if (sig2str(si.si_signo, signame) == -1)
192		(void) strcpy(signame, "unknown");
193
194	mdb_printf("  signal %5d (%s)\n", si.si_signo, signame);
195	mdb_printf("  code   %5d (", si.si_code);
196
197	switch (si.si_code) {
198	case SI_NOINFO:
199		mdb_printf("no info");
200		break;
201	case SI_DTRACE:
202		mdb_printf("from DTrace raise() action");
203		break;
204	case SI_RCTL:
205		mdb_printf("from rctl action");
206		break;
207	case SI_USER:
208		mdb_printf("user generated via kill");
209		break;
210	case SI_LWP:
211		mdb_printf("user generated via lwp_kill");
212		break;
213	case SI_QUEUE:
214		mdb_printf("user generated via sigqueue");
215		break;
216	case SI_TIMER:
217		mdb_printf("from timer expiration");
218		break;
219	case SI_ASYNCIO:
220		mdb_printf("from async i/o completion");
221		break;
222	case SI_MESGQ:
223		mdb_printf("from message arrival");
224		break;
225	default:
226		if (SI_FROMUSER(&si))
227			mdb_printf("from user process");
228		else
229			mdb_printf("from kernel");
230	}
231
232	mdb_printf(")\n  errno  %5d (%s)\n",
233	    si.si_errno, strerror(si.si_errno));
234
235	if (si.si_code == SI_USER || si.si_code == SI_QUEUE) {
236		mdb_printf("  signal sent from PID %d (uid %d)\n",
237		    si.si_pid, si.si_uid);
238	}
239
240	if (si.si_code == SI_QUEUE) {
241		mdb_printf("  signal value = 0t%d / %p\n",
242		    si.si_value.sival_int, si.si_value.sival_ptr);
243	}
244
245	switch (si.si_signo) {
246	case SIGCLD:
247		mdb_printf("  signal sent from child PID %d (uid %d)\n",
248		    si.si_pid, si.si_uid);
249		mdb_printf("  usr time = 0t%ld ticks, sys time = 0t%ld ticks\n",
250		    si.si_utime, si.si_stime);
251		mdb_printf("  wait status = 0x%x\n", si.si_status);
252		break;
253
254	case SIGSEGV:
255	case SIGBUS:
256	case SIGILL:
257	case SIGTRAP:
258	case SIGFPE:
259		mdb_printf("  fault address = 0x%p\n  trapno = %d\n",
260		    si.si_addr, si.si_trapno);
261		mdb_printf("  instruction address = 0x%p %lA\n",
262		    si.si_pc, si.si_pc);
263		break;
264
265	case SIGPOLL:
266	case SIGXFSZ:
267		mdb_printf("  fd = %d  band = 0x%lx\n",
268		    si.si_fd, si.si_band);
269		break;
270
271	case SIGPROF:
272		mdb_printf("  last fault address = 0x%p fault type = %d\n",
273		    si.si_faddr, si.si_fault);
274		mdb_printf("  timestamp = 0t%ld sec 0t%ld nsec\n",
275		    si.si_tstamp.tv_sec, si.si_tstamp.tv_nsec);
276
277		if (si.__data.__prof.__syscall != 0) {
278			mdb_printf("  system call %d (", si.si_syscall);
279			if (si.si_nsysarg > 0) {
280				mdb_printf("%lx", si.si_sysarg[0]);
281				for (i = 1; i < si.si_nsysarg; i++)
282					mdb_printf(", %lx", si.si_sysarg[i]);
283			}
284			mdb_printf("  )\n");
285		}
286
287		for (i = 0; i < sizeof (msname) / sizeof (msname[0]); i++) {
288			mdb_printf("  mstate[\"%s\"] = %d\n",
289			    msname[i], si.si_mstate[i]);
290		}
291		break;
292	}
293
294	return (DCMD_OK);
295}
296
297static int
298uc_walk_step(mdb_walk_state_t *wsp)
299{
300	uintptr_t addr = wsp->walk_addr;
301	ucontext_t uc;
302
303	if (addr == NULL)
304		return (WALK_DONE);
305
306	if (mdb_vread(&uc, sizeof (uc), addr) != sizeof (uc)) {
307		mdb_warn("failed to read ucontext at %p", addr);
308		return (WALK_ERR);
309	}
310
311	wsp->walk_addr = (uintptr_t)uc.uc_link;
312	return (wsp->walk_callback(addr, &uc, wsp->walk_cbdata));
313}
314
315static int
316oldc_walk_init(mdb_walk_state_t *wsp)
317{
318	ssize_t nbytes = mdb_get_xdata("lwpstatus", NULL, 0);
319
320	if (nbytes <= 0) {
321		mdb_warn("lwpstatus information not available");
322		return (WALK_ERR);
323	}
324
325	if (wsp->walk_addr != NULL) {
326		mdb_warn("walker only supports global walk\n");
327		return (WALK_ERR);
328	}
329
330	wsp->walk_addr = nbytes; /* Use walk_addr to track size */
331	wsp->walk_data = mdb_alloc(nbytes, UM_SLEEP);
332
333	if (mdb_get_xdata("lwpstatus", wsp->walk_data, nbytes) != nbytes) {
334		mdb_warn("failed to read lwpstatus information");
335		mdb_free(wsp->walk_data, nbytes);
336		return (WALK_ERR);
337	}
338
339	wsp->walk_arg = wsp->walk_data; /* Use walk_arg to track pointer */
340	return (WALK_NEXT);
341}
342
343static int
344oldc_walk_step(mdb_walk_state_t *wsp)
345{
346	const lwpstatus_t *lsp, *end;
347
348	end = (const lwpstatus_t *)((uintptr_t)wsp->walk_data + wsp->walk_addr);
349	lsp = wsp->walk_arg;
350
351	wsp->walk_arg = (void *)(lsp + 1);
352
353	if (lsp < end) {
354		uintptr_t addr = lsp->pr_oldcontext;
355		ucontext_t uc;
356
357		if (addr == NULL)
358			return (WALK_NEXT);
359
360		if (mdb_vread(&uc, sizeof (uc), addr) != sizeof (uc)) {
361			mdb_warn("failed to read ucontext at %p", addr);
362			return (WALK_NEXT);
363		}
364
365		return (wsp->walk_callback(addr, &uc, wsp->walk_cbdata));
366	}
367
368	return (WALK_DONE);
369}
370
371static void
372oldc_walk_fini(mdb_walk_state_t *wsp)
373{
374	mdb_free(wsp->walk_data, wsp->walk_addr); /* walk_addr has size */
375}
376
377/*
378 * ==================== threads ==========================
379 * These are the interfaces that used to require libthread.
380 * Now, libthread has been folded into libc.
381 * =======================================================
382 */
383
384/*
385 * prt_addr() is called up to three times to generate arguments for
386 * one call to mdb_printf().  We must return at least three different
387 * pointers to static storage for consecutive calls to prt_addr().
388 */
389static const char *
390prt_addr(void *addr, int pad)
391{
392	static char buffer[4][24];
393	static int ix = 0;
394	char *buf;
395
396	if (ix == 4)	/* use buffers in sequence: 0, 1, 2, 3 */
397		ix = 0;
398	buf = buffer[ix++];
399	if (addr == NULL)
400		return (pad? "<NULL>               " : "<NULL>");
401	else {
402#ifdef _LP64
403		(void) mdb_snprintf(buf, sizeof (buffer[0]), "0x%016lx", addr);
404		if (pad)
405			(void) strcpy(buf + 18, "   ");
406#else
407		(void) mdb_snprintf(buf, sizeof (buffer[0]), "0x%08lx", addr);
408		if (pad)
409			(void) strcpy(buf + 10, "           ");
410#endif	/* _LP64 */
411		return (buf);
412	}
413}
414
415#define	HD(str)		mdb_printf("           " str "\n")
416#define	OFFSTR		"+0x%-7lx "
417#define	OFFSET(member)	((size_t)OFFSETOF(ulwp_t, member))
418
419/*ARGSUSED*/
420static int
421d_ulwp(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
422{
423	ulwp_t ulwp;
424
425	if (argc != 0 || !(flags & DCMD_ADDRSPEC))
426		return (DCMD_USAGE);
427
428	if (mdb_vread(&ulwp, sizeof (ulwp), addr) != sizeof (ulwp) &&
429	    (bzero(&ulwp, sizeof (ulwp)),
430	    mdb_vread(&ulwp, REPLACEMENT_SIZE, addr)) != REPLACEMENT_SIZE) {
431		mdb_warn("failed to read ulwp at 0x%p", addr);
432		return (DCMD_ERR);
433	}
434
435	mdb_printf("%#a\n", addr);
436
437	HD("self                  uberdata");
438	mdb_printf(OFFSTR "%s %s\n",
439	    OFFSET(ul_self),
440	    prt_addr(ulwp.ul_self, 1),
441	    prt_addr(ulwp.ul_uberdata, 0));
442
443	HD("tlsent                ntlsent");
444	mdb_printf(OFFSTR "%s %ld\n",
445	    OFFSET(ul_tlsent),
446	    prt_addr(ulwp.ul_tlsent, 1),
447	    ulwp.ul_ntlsent);
448
449	HD("forw                  back                  next");
450	mdb_printf(OFFSTR "%s %s %s\n",
451	    OFFSET(ul_forw),
452	    prt_addr(ulwp.ul_forw, 1),
453	    prt_addr(ulwp.ul_back, 1),
454	    prt_addr(ulwp.ul_next, 0));
455
456	HD("hash                  rval                  stk");
457	mdb_printf(OFFSTR "%s %s %s\n",
458	    OFFSET(ul_hash),
459	    prt_addr(ulwp.ul_hash, 1),
460	    prt_addr(ulwp.ul_rval, 1),
461	    prt_addr(ulwp.ul_stk, 0));
462
463	HD("mapsiz     guardsize  stktop                stksiz");
464	mdb_printf(OFFSTR "%-10ld %-10ld %s %ld\n",
465	    OFFSET(ul_mapsiz),
466	    ulwp.ul_mapsiz,
467	    ulwp.ul_guardsize,
468	    prt_addr((void *)ulwp.ul_stktop, 1),
469	    ulwp.ul_stksiz);
470
471	HD("ustack.ss_sp          ustack.ss_size        ustack.ss_flags");
472	mdb_printf(OFFSTR "%s %-21ld %s\n",
473	    OFFSET(ul_ustack.ss_sp),
474	    prt_addr(ulwp.ul_ustack.ss_sp, 1),
475	    ulwp.ul_ustack.ss_size,
476	    stack_flags(&ulwp.ul_ustack));
477
478	HD("ix         lwpid      pri        epri       policy     cid");
479	mdb_printf(OFFSTR "%-10d %-10d %-10d %-10d %-10d %d\n",
480	    OFFSET(ul_ix),
481	    ulwp.ul_ix,
482	    ulwp.ul_lwpid,
483	    ulwp.ul_pri,
484	    ulwp.ul_epri,
485	    ulwp.ul_policy,
486	    ulwp.ul_cid);
487
488	HD("cursig     pleasestop stop       signalled  dead       unwind");
489	mdb_printf(OFFSTR "%-10d ",
490	    OFFSET(ul_cursig),
491	    ulwp.ul_cursig);
492	mdb_printf(ulwp.ul_pleasestop? "0x%-8x " : "%-10d ",
493	    ulwp.ul_pleasestop);
494	mdb_printf(ulwp.ul_stop? "0x%-8x " : "%-10d ",
495	    ulwp.ul_stop);
496	mdb_printf("%-10d %-10d %d\n",
497	    ulwp.ul_signalled,
498	    ulwp.ul_dead,
499	    ulwp.ul_unwind);
500
501	HD("detached   writer     stopping   can'prolog preempt    savpreempt");
502	mdb_printf(OFFSTR "%-10d %-10d %-10d %-10d %-10d %d\n",
503	    OFFSET(ul_detached),
504	    ulwp.ul_detached,
505	    ulwp.ul_writer,
506	    ulwp.ul_stopping,
507	    ulwp.ul_cancel_prologue,
508	    ulwp.ul_preempt,
509	    ulwp.ul_savpreempt);
510
511	HD("sigsuspend main       fork       primarymap m'spinners d'noreserv");
512	mdb_printf(OFFSTR "%-10d %-10d %-10d %-10d %-10d %d\n",
513	    OFFSET(ul_sigsuspend),
514	    ulwp.ul_sigsuspend,
515	    ulwp.ul_main,
516	    ulwp.ul_fork,
517	    ulwp.ul_primarymap,
518	    ulwp.ul_max_spinners,
519	    ulwp.ul_door_noreserve);
520
521	HD("queue_fifo c'w'defer  e'detect'  async_safe rt         rtqueued");
522	mdb_printf(OFFSTR "%-10d %-10d %-10d %-10d %-10d %d\n",
523	    OFFSET(ul_queue_fifo),
524	    ulwp.ul_queue_fifo,
525	    ulwp.ul_cond_wait_defer,
526	    ulwp.ul_error_detection,
527	    ulwp.ul_async_safe,
528	    ulwp.ul_rt,
529	    ulwp.ul_rtqueued);
530
531	HD("misaligned adapt'spin queue_spin critical   sigdefer   vfork");
532	mdb_printf(OFFSTR "%-10d %-10d %-10d %-10d %-10d %d\n",
533	    OFFSET(ul_misaligned),
534	    ulwp.ul_misaligned,
535	    ulwp.ul_adaptive_spin,
536	    ulwp.ul_queue_spin,
537	    ulwp.ul_critical,
538	    ulwp.ul_sigdefer,
539	    ulwp.ul_vfork);
540
541	HD("cancelable c'pending  c'disabled c'async    save_async mutator");
542	mdb_printf(OFFSTR "%-10d %-10d %-10d %-10d %-10d %d\n",
543	    OFFSET(ul_cancelable),
544	    ulwp.ul_cancelable,
545	    ulwp.ul_cancel_pending,
546	    ulwp.ul_cancel_disabled,
547	    ulwp.ul_cancel_async,
548	    ulwp.ul_save_async,
549	    ulwp.ul_mutator);
550
551	HD("created    replace    nocancel   errno      errnop");
552	mdb_printf(OFFSTR "%-10d %-10d %-10d %-10d %s\n",
553	    OFFSET(ul_created),
554	    ulwp.ul_created,
555	    ulwp.ul_replace,
556	    ulwp.ul_nocancel,
557	    ulwp.ul_errno,
558	    prt_addr(ulwp.ul_errnop, 0));
559
560	HD("clnup_hdr             schedctl_called       schedctl");
561	mdb_printf(OFFSTR "%s %s %s\n",
562	    OFFSET(ul_clnup_hdr),
563	    prt_addr(ulwp.ul_clnup_hdr, 1),
564	    prt_addr(ulwp.ul_schedctl_called, 1),
565	    prt_addr((void *)ulwp.ul_schedctl, 0));
566
567	HD("bindflags  libc_locks stsd                  &ftsd");
568	mdb_printf(OFFSTR,
569	    OFFSET(ul_bindflags));
570	mdb_printf(ulwp.ul_bindflags? "0x%-8x " : "%-10d ",
571	    ulwp.ul_bindflags);
572	mdb_printf("%-10d ", ulwp.ul_libc_locks);
573	mdb_printf("%s %s\n",
574	    prt_addr(ulwp.ul_stsd, 1),
575	    prt_addr((void *)(addr + OFFSET(ul_ftsd[0])), 0));
576
577	HD("eventmask[0..1]       eventnum              eventdata");
578	mdb_printf(OFFSTR "0x%08x 0x%08x %-21d %s\n",
579	    OFFSET(ul_td_evbuf.eventmask.event_bits[0]),
580	    ulwp.ul_td_evbuf.eventmask.event_bits[0],
581	    ulwp.ul_td_evbuf.eventmask.event_bits[1],
582	    ulwp.ul_td_evbuf.eventnum,
583	    prt_addr(ulwp.ul_td_evbuf.eventdata, 0));
584
585	HD("td'enable  sync'reg   qtype      cv_wake    usropts");
586	mdb_printf(OFFSTR "%-10d %-10d %-10d %-10d ",
587	    OFFSET(ul_td_events_enable),
588	    ulwp.ul_td_events_enable,
589	    ulwp.ul_sync_obj_reg,
590	    ulwp.ul_qtype,
591	    ulwp.ul_cv_wake);
592	mdb_printf(ulwp.ul_usropts? "0x%x\n" : "%d\n",
593	    ulwp.ul_usropts);
594
595	HD("startpc               startarg              wchan");
596	mdb_printf(OFFSTR "%s %s %s\n",
597	    OFFSET(ul_startpc),
598	    prt_addr((void *)ulwp.ul_startpc, 1),
599	    prt_addr(ulwp.ul_startarg, 1),
600	    prt_addr(ulwp.ul_wchan, 0));
601
602	HD("link                  sleepq                cvmutex");
603	mdb_printf(OFFSTR "%s %s %s\n",
604	    OFFSET(ul_link),
605	    prt_addr(ulwp.ul_link, 1),
606	    prt_addr(ulwp.ul_sleepq, 1),
607	    prt_addr(ulwp.ul_cvmutex, 0));
608
609	HD("mxchain               save_state");
610	mdb_printf(OFFSTR "%s %d\n",
611	    OFFSET(ul_mxchain),
612	    prt_addr(ulwp.ul_mxchain, 1),
613	    ulwp.ul_save_state);
614
615	HD("rdlockcnt             rd_rwlock             rd_count");
616	mdb_printf(OFFSTR "%-21d %s %d\n",
617	    OFFSET(ul_rdlockcnt),
618	    ulwp.ul_rdlockcnt,
619	    prt_addr(ulwp.ul_readlock.single.rd_rwlock, 1),
620	    ulwp.ul_readlock.single.rd_count);
621
622	HD("heldlockcnt           heldlocks             tpdp");
623	mdb_printf(OFFSTR "%-21d %s %s\n",
624	    OFFSET(ul_heldlockcnt),
625	    ulwp.ul_heldlockcnt,
626	    prt_addr(ulwp.ul_heldlocks.single, 1),
627	    prt_addr(ulwp.ul_tpdp, 0));
628
629	HD("siglink               s'l'spin   s'l'spin2  s'l'sleep  s'l'wakeup");
630	mdb_printf(OFFSTR "%s %-10d %-10d %-10d %d\n",
631	    OFFSET(ul_siglink),
632	    prt_addr(ulwp.ul_siglink, 1),
633	    ulwp.ul_spin_lock_spin,
634	    ulwp.ul_spin_lock_spin2,
635	    ulwp.ul_spin_lock_sleep,
636	    ulwp.ul_spin_lock_wakeup);
637
638	HD("&queue_root           rtclassid  pilocks");
639	mdb_printf(OFFSTR "%s %-10d %d\n",
640	    OFFSET(ul_queue_root),
641	    prt_addr((void *)(addr + OFFSET(ul_queue_root)), 1),
642	    ulwp.ul_rtclassid,
643	    ulwp.ul_pilocks);
644
645	/*
646	 * The remainder of the ulwp_t structure
647	 * is invalid if this is a replacement.
648	 */
649	if (ulwp.ul_replace)
650		return (DCMD_OK);
651
652	HD("sigmask[0..3]");
653	mdb_printf(OFFSTR "0x%08x 0x%08x 0x%08x 0x%08x\n",
654	    OFFSET(ul_sigmask.__sigbits[0]),
655	    ulwp.ul_sigmask.__sigbits[0],
656	    ulwp.ul_sigmask.__sigbits[1],
657	    ulwp.ul_sigmask.__sigbits[2],
658	    ulwp.ul_sigmask.__sigbits[3]);
659
660	HD("tmpmask[0..3]");
661	mdb_printf(OFFSTR "0x%08x 0x%08x 0x%08x 0x%08x\n",
662	    OFFSET(ul_tmpmask.__sigbits[0]),
663	    ulwp.ul_tmpmask.__sigbits[0],
664	    ulwp.ul_tmpmask.__sigbits[1],
665	    ulwp.ul_tmpmask.__sigbits[2],
666	    ulwp.ul_tmpmask.__sigbits[3]);
667
668	HD("&siginfo              &spinlock             &fpuenv");
669	mdb_printf(OFFSTR "%s %s %s\n",
670	    OFFSET(ul_siginfo),
671	    prt_addr((void *)(addr + OFFSET(ul_siginfo)), 1),
672	    prt_addr((void *)(addr + OFFSET(ul_spinlock)), 1),
673	    prt_addr((void *)(addr + OFFSET(ul_fpuenv)), 0));
674
675	return (DCMD_OK);
676}
677
678/*
679 * Get the address of the unique uberdata_t structure.
680 */
681static uintptr_t
682uberdata_addr(void)
683{
684	uintptr_t uaddr;
685	uintptr_t addr;
686	GElf_Sym sym;
687
688	if (mdb_lookup_by_obj("libc.so.1", "_tdb_bootstrap", &sym) != 0) {
689		mdb_warn("cannot find libc.so.1`_tdb_bootstrap");
690		return (NULL);
691	}
692	if (mdb_vread(&addr, sizeof (addr), sym.st_value) == sizeof (addr) &&
693	    addr != NULL &&
694	    mdb_vread(&uaddr, sizeof (uaddr), addr) == sizeof (uaddr) &&
695	    uaddr != NULL) {
696		return (uaddr);
697	}
698	if (mdb_lookup_by_obj("libc.so.1", "_uberdata", &sym) != 0) {
699		mdb_warn("cannot find libc.so.1`_uberdata");
700		return (NULL);
701	}
702	return ((uintptr_t)sym.st_value);
703}
704
705#undef OFFSET
706#define	OFFSET(member)	((size_t)OFFSETOF(uberdata_t, member))
707
708/*ARGSUSED*/
709static int
710d_uberdata(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
711{
712	uberdata_t uberdata;
713	int i;
714
715	if (argc != 0)
716		return (DCMD_USAGE);
717	if (!(flags & DCMD_ADDRSPEC) && (addr = uberdata_addr()) == NULL)
718		return (DCMD_ERR);
719
720	if (mdb_vread(&uberdata, sizeof (uberdata), addr) !=
721	    sizeof (uberdata)) {
722		mdb_warn("failed to read uberdata at 0x%p", addr);
723		return (DCMD_ERR);
724	}
725
726	mdb_printf("%#a\n", addr);
727
728	HD("&link_lock            &ld_lock              &fork_lock");
729	mdb_printf(OFFSTR "%s %s %s\n",
730	    OFFSET(link_lock),
731	    prt_addr((void *)(addr + OFFSET(link_lock)), 1),
732	    prt_addr((void *)(addr + OFFSET(ld_lock)), 1),
733	    prt_addr((void *)(addr + OFFSET(fork_lock)), 0));
734
735	HD("&atfork_lock          &callout_lock         &tdb_hash_lock");
736	mdb_printf(OFFSTR "%s %s %s\n",
737	    OFFSET(atfork_lock),
738	    prt_addr((void *)(addr + OFFSET(atfork_lock)), 1),
739	    prt_addr((void *)(addr + OFFSET(callout_lock)), 1),
740	    prt_addr((void *)(addr + OFFSET(tdb_hash_lock)), 0));
741
742	HD("&tdb_hash_lock_stats  &siguaction[0]");
743	mdb_printf(OFFSTR "%s %s\n",
744	    OFFSET(tdb_hash_lock_stats),
745	    prt_addr((void *)(addr + OFFSET(tdb_hash_lock_stats)), 1),
746	    prt_addr((void *)(addr + OFFSET(siguaction)), 0));
747
748	HD("&bucket               free_list             chunks");
749	for (i = 0; i < NBUCKETS; i++) {
750		mdb_printf(OFFSTR "%s %s %ld\n",
751		    OFFSET(bucket[i]),
752		    prt_addr((void *)(addr + OFFSET(bucket[i])), 1),
753		    prt_addr(uberdata.bucket[i].free_list, 1),
754		    uberdata.bucket[i].chunks);
755	}
756
757	HD("&atexit_root          head                  exit_frame_monitor");
758	mdb_printf(OFFSTR "%s %s %s\n",
759	    OFFSET(atexit_root),
760	    prt_addr((void *)(addr + OFFSET(atexit_root.exitfns_lock)), 1),
761	    prt_addr(uberdata.atexit_root.head, 1),
762	    prt_addr(uberdata.atexit_root.exit_frame_monitor, 0));
763
764	HD("&tsd_metadata         tsdm_nkeys tsdm_nused tsdm_destro");
765	mdb_printf(OFFSTR "%s %-10d %-10d %s\n",
766	    OFFSET(tsd_metadata),
767	    prt_addr((void *)(addr + OFFSET(tsd_metadata.tsdm_lock)), 1),
768	    uberdata.tsd_metadata.tsdm_nkeys,
769	    uberdata.tsd_metadata.tsdm_nused,
770	    prt_addr((void *)uberdata.tsd_metadata.tsdm_destro, 0));
771
772	HD("&tls_metadata         tls_modinfo.data      tls_modinfo.size");
773	mdb_printf(OFFSTR "%s %s %ld\n",
774	    OFFSET(tls_metadata),
775	    prt_addr((void *)(addr + OFFSET(tls_metadata.tls_lock)), 1),
776	    prt_addr(uberdata.tls_metadata.tls_modinfo.tls_data, 1),
777	    uberdata.tls_metadata.tls_modinfo.tls_size);
778
779	HD("                      static_tls.data       static_tls.size");
780	mdb_printf(OFFSTR "%s %s %ld\n",
781	    OFFSET(tls_metadata.static_tls),
782	    "                     ",
783	    prt_addr(uberdata.tls_metadata.static_tls.tls_data, 1),
784	    uberdata.tls_metadata.static_tls.tls_size);
785
786	HD("primary_ma bucket_ini uflags.mt  uflags.pad uflags.trs uflags.ted");
787	mdb_printf(OFFSTR "%-10d %-10d %-10d %-10d %-10d %d\n",
788	    OFFSET(primary_map),
789	    uberdata.primary_map,
790	    uberdata.bucket_init,
791	    uberdata.uberflags.uf_x.x_mt,
792	    uberdata.uberflags.uf_x.x_pad,
793	    uberdata.uberflags.uf_x.x_tdb_register_sync,
794	    uberdata.uberflags.uf_x.x_thread_error_detection);
795
796	HD("queue_head            thr_hash_table        hash_size  hash_mask");
797	mdb_printf(OFFSTR "%s %s %-10d 0x%x\n",
798	    OFFSET(queue_head),
799	    prt_addr(uberdata.queue_head, 1),
800	    prt_addr(uberdata.thr_hash_table, 1),
801	    uberdata.hash_size,
802	    uberdata.hash_mask);
803
804	HD("ulwp_one              all_lwps              all_zombies");
805	mdb_printf(OFFSTR "%s %s %s\n",
806	    OFFSET(ulwp_one),
807	    prt_addr(uberdata.ulwp_one, 1),
808	    prt_addr(uberdata.all_lwps, 1),
809	    prt_addr(uberdata.all_zombies, 0));
810
811	HD("nthreads   nzombies   ndaemons   pid        sigacthandler");
812	mdb_printf(OFFSTR "%-10d %-10d %-10d %-10d %s\n",
813	    OFFSET(nthreads),
814	    uberdata.nthreads,
815	    uberdata.nzombies,
816	    uberdata.ndaemons,
817	    (int)uberdata.pid,
818	    prt_addr((void *)uberdata.sigacthandler, 0));
819
820	HD("lwp_stacks            lwp_laststack         nfreestack stk_cache");
821	mdb_printf(OFFSTR "%s %s %-10d %d\n",
822	    OFFSET(lwp_stacks),
823	    prt_addr(uberdata.lwp_stacks, 1),
824	    prt_addr(uberdata.lwp_laststack, 1),
825	    uberdata.nfreestack,
826	    uberdata.thread_stack_cache);
827
828	HD("ulwp_freelist         ulwp_lastfree         ulwp_replace_free");
829	mdb_printf(OFFSTR "%s %s %s\n",
830	    OFFSET(ulwp_freelist),
831	    prt_addr(uberdata.ulwp_freelist, 1),
832	    prt_addr(uberdata.ulwp_lastfree, 1),
833	    prt_addr(uberdata.ulwp_replace_free, 0));
834
835	HD("ulwp_replace_last     atforklist");
836	mdb_printf(OFFSTR "%s %s\n",
837	    OFFSET(ulwp_replace_last),
838	    prt_addr(uberdata.ulwp_replace_last, 1),
839	    prt_addr(uberdata.atforklist, 0));
840
841	HD("robustlocks           robustlist");
842	mdb_printf(OFFSTR "%s %s\n",
843	    OFFSET(robustlocks),
844	    prt_addr(uberdata.robustlocks, 1),
845	    prt_addr(uberdata.robustlist, 0));
846
847	HD("tdb_bootstrap         tdb_sync_addr_hash    tdb_'count tdb_'fail");
848	mdb_printf(OFFSTR "%s %s %-10d %d\n",
849	    OFFSET(tdb_bootstrap),
850	    prt_addr(uberdata.tdb_bootstrap, 1),
851	    prt_addr(uberdata.tdb.tdb_sync_addr_hash, 1),
852	    uberdata.tdb.tdb_register_count,
853	    uberdata.tdb.tdb_hash_alloc_failed);
854
855	HD("tdb_sync_addr_free    tdb_sync_addr_last    tdb_sync_alloc");
856	mdb_printf(OFFSTR "%s %s %ld\n",
857	    OFFSET(tdb.tdb_sync_addr_free),
858	    prt_addr(uberdata.tdb.tdb_sync_addr_free, 1),
859	    prt_addr(uberdata.tdb.tdb_sync_addr_last, 1),
860	    uberdata.tdb.tdb_sync_alloc);
861
862	HD("tdb_ev_global_mask    tdb_events");
863	mdb_printf(OFFSTR "0x%08x 0x%08x %s\n",
864	    OFFSET(tdb.tdb_ev_global_mask),
865	    uberdata.tdb.tdb_ev_global_mask.event_bits[0],
866	    uberdata.tdb.tdb_ev_global_mask.event_bits[1],
867	    prt_addr((void *)uberdata.tdb.tdb_events, 0));
868
869	return (DCMD_OK);
870}
871
872static int
873ulwp_walk_init(mdb_walk_state_t *wsp)
874{
875	uintptr_t addr = wsp->walk_addr;
876	uintptr_t uber_addr;
877
878	if (addr == NULL &&
879	    ((uber_addr = uberdata_addr()) == NULL ||
880	    mdb_vread(&addr, sizeof (addr),
881	    uber_addr + OFFSETOF(uberdata_t, all_lwps))
882	    != sizeof (addr))) {
883		mdb_warn("cannot find 'uberdata.all_lwps'");
884		return (WALK_ERR);
885	}
886	if (addr == NULL)
887		return (WALK_DONE);
888	wsp->walk_addr = addr;
889	wsp->walk_data = (void *)addr;
890	return (WALK_NEXT);
891}
892
893static int
894ulwp_walk_step(mdb_walk_state_t *wsp)
895{
896	uintptr_t addr = wsp->walk_addr;
897	ulwp_t ulwp;
898
899	if (addr == NULL)
900		return (WALK_DONE);
901	if (mdb_vread(&ulwp, sizeof (ulwp), addr) != sizeof (ulwp) &&
902	    (bzero(&ulwp, sizeof (ulwp)),
903	    mdb_vread(&ulwp, REPLACEMENT_SIZE, addr)) != REPLACEMENT_SIZE) {
904		mdb_warn("failed to read ulwp at 0x%p", addr);
905		return (WALK_ERR);
906	}
907	/*
908	 * If we have looped around to the beginning
909	 * of the circular linked list, we are done.
910	 */
911	if ((wsp->walk_addr = (uintptr_t)ulwp.ul_forw)
912	    == (uintptr_t)wsp->walk_data)
913		wsp->walk_addr = NULL;
914	return (wsp->walk_callback(addr, &ulwp, wsp->walk_cbdata));
915}
916
917/*
918 * =======================================================
919 * End of thread (previously libthread) interfaces.
920 * ==================== threads ==========================
921 */
922
923static const mdb_dcmd_t dcmds[] = {
924	{ "jmp_buf", ":", "print jmp_buf contents", d_jmp_buf, NULL },
925	{ "sigjmp_buf", ":", "print sigjmp_buf contents", d_sigjmp_buf, NULL },
926	{ "siginfo", ":", "print siginfo_t structure", d_siginfo, NULL },
927	{ "ucontext", ":", "print ucontext_t structure", d_ucontext, NULL },
928	{ "ulwp", ":", "print ulwp_t structure", d_ulwp, NULL },
929	{ "uberdata", ":", "print uberdata_t structure", d_uberdata, NULL },
930	{ NULL }
931};
932
933static const mdb_walker_t walkers[] = {
934	{ "ucontext", "walk ucontext_t uc_link list",
935		NULL, uc_walk_step, NULL, NULL },
936	{ "oldcontext", "walk per-lwp oldcontext pointers",
937		oldc_walk_init, oldc_walk_step, oldc_walk_fini, NULL },
938	{ "ulwps", "walk list of ulwp_t pointers",
939		ulwp_walk_init, ulwp_walk_step, NULL, NULL },
940	{ NULL }
941};
942
943static const mdb_modinfo_t modinfo = { MDB_API_VERSION, dcmds, walkers };
944
945const mdb_modinfo_t *
946_mdb_init(void)
947{
948	return (&modinfo);
949}
950