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 * Portions Copyright 2006-2008 John Birrell jb@freebsd.org
22 *
23 * $FreeBSD: stable/11/sys/cddl/dev/profile/profile.c 324282 2017-10-04 15:47:16Z markj $
24 *
25 */
26
27/*
28 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
29 * Use is subject to license terms.
30 */
31
32#include <sys/cdefs.h>
33#include <sys/param.h>
34#include <sys/systm.h>
35#include <sys/conf.h>
36#include <sys/cpuvar.h>
37#include <sys/fcntl.h>
38#include <sys/filio.h>
39#include <sys/kdb.h>
40#include <sys/kernel.h>
41#include <sys/kmem.h>
42#include <sys/kthread.h>
43#include <sys/limits.h>
44#include <sys/linker.h>
45#include <sys/lock.h>
46#include <sys/malloc.h>
47#include <sys/module.h>
48#include <sys/mutex.h>
49#include <sys/poll.h>
50#include <sys/proc.h>
51#include <sys/selinfo.h>
52#include <sys/smp.h>
53#include <sys/sysctl.h>
54#include <sys/uio.h>
55#include <sys/unistd.h>
56#include <machine/cpu.h>
57#include <machine/stdarg.h>
58
59#include <sys/dtrace.h>
60#include <sys/dtrace_bsd.h>
61
62#define	PROF_NAMELEN		15
63
64#define	PROF_PROFILE		0
65#define	PROF_TICK		1
66#define	PROF_PREFIX_PROFILE	"profile-"
67#define	PROF_PREFIX_TICK	"tick-"
68
69/*
70 * Regardless of platform, there are five artificial frames in the case of the
71 * profile provider:
72 *
73 *	profile_fire
74 *	cyclic_expire
75 *	cyclic_fire
76 *	[ cbe ]
77 *	[ locore ]
78 *
79 * On amd64, there are two frames associated with locore:  one in locore, and
80 * another in common interrupt dispatch code.  (i386 has not been modified to
81 * use this common layer.)  Further, on i386, the interrupted instruction
82 * appears as its own stack frame.  All of this means that we need to add one
83 * frame for amd64, and then take one away for both amd64 and i386.
84 *
85 * On SPARC, the picture is further complicated because the compiler
86 * optimizes away tail-calls -- so the following frames are optimized away:
87 *
88 * 	profile_fire
89 *	cyclic_expire
90 *
91 * This gives three frames.  However, on DEBUG kernels, the cyclic_expire
92 * frame cannot be tail-call eliminated, yielding four frames in this case.
93 *
94 * All of the above constraints lead to the mess below.  Yes, the profile
95 * provider should ideally figure this out on-the-fly by hiting one of its own
96 * probes and then walking its own stack trace.  This is complicated, however,
97 * and the static definition doesn't seem to be overly brittle.  Still, we
98 * allow for a manual override in case we get it completely wrong.
99 */
100#ifdef __amd64
101#define	PROF_ARTIFICIAL_FRAMES	10
102#else
103#ifdef __i386
104#define	PROF_ARTIFICIAL_FRAMES	6
105#else
106#ifdef __sparc
107#ifdef DEBUG
108#define	PROF_ARTIFICIAL_FRAMES	4
109#else
110#define	PROF_ARTIFICIAL_FRAMES	3
111#endif
112#endif
113#endif
114#endif
115
116#ifdef __mips
117/*
118 * This value is bogus just to make module compilable on mips
119 */
120#define	PROF_ARTIFICIAL_FRAMES	3
121#endif
122
123#ifdef __powerpc__
124/*
125 * This value is bogus just to make module compilable on powerpc
126 */
127#define	PROF_ARTIFICIAL_FRAMES	3
128#endif
129
130struct profile_probe_percpu;
131
132#ifdef __mips
133/* bogus */
134#define	PROF_ARTIFICIAL_FRAMES	3
135#endif
136
137#ifdef __arm__
138#define	PROF_ARTIFICIAL_FRAMES	3
139#endif
140
141#ifdef __aarch64__
142/* TODO: verify */
143#define	PROF_ARTIFICIAL_FRAMES	10
144#endif
145
146#ifdef __riscv__
147/* TODO: verify */
148#define	PROF_ARTIFICIAL_FRAMES	10
149#endif
150
151typedef struct profile_probe {
152	char		prof_name[PROF_NAMELEN];
153	dtrace_id_t	prof_id;
154	int		prof_kind;
155#ifdef illumos
156	hrtime_t	prof_interval;
157	cyclic_id_t	prof_cyclic;
158#else
159	sbintime_t	prof_interval;
160	struct callout	prof_cyclic;
161	sbintime_t	prof_expected;
162	struct profile_probe_percpu **prof_pcpus;
163#endif
164} profile_probe_t;
165
166typedef struct profile_probe_percpu {
167	hrtime_t	profc_expected;
168	hrtime_t	profc_interval;
169	profile_probe_t	*profc_probe;
170#ifdef __FreeBSD__
171	struct callout	profc_cyclic;
172#endif
173} profile_probe_percpu_t;
174
175static d_open_t	profile_open;
176static int	profile_unload(void);
177static void	profile_create(hrtime_t, char *, int);
178static void	profile_destroy(void *, dtrace_id_t, void *);
179static void	profile_enable(void *, dtrace_id_t, void *);
180static void	profile_disable(void *, dtrace_id_t, void *);
181static void	profile_load(void *);
182static void	profile_provide(void *, dtrace_probedesc_t *);
183
184static int profile_rates[] = {
185    97, 199, 499, 997, 1999,
186    4001, 4999, 0, 0, 0,
187    0, 0, 0, 0, 0,
188    0, 0, 0, 0, 0
189};
190
191static int profile_ticks[] = {
192    1, 10, 100, 500, 1000,
193    5000, 0, 0, 0, 0,
194    0, 0, 0, 0, 0
195};
196
197/*
198 * profile_max defines the upper bound on the number of profile probes that
199 * can exist (this is to prevent malicious or clumsy users from exhausing
200 * system resources by creating a slew of profile probes). At mod load time,
201 * this gets its value from PROFILE_MAX_DEFAULT or profile-max-probes if it's
202 * present in the profile.conf file.
203 */
204#define	PROFILE_MAX_DEFAULT	1000	/* default max. number of probes */
205static uint32_t profile_max = PROFILE_MAX_DEFAULT;
206					/* maximum number of profile probes */
207static uint32_t profile_total;		/* current number of profile probes */
208
209static struct cdevsw profile_cdevsw = {
210	.d_version	= D_VERSION,
211	.d_open		= profile_open,
212	.d_name		= "profile",
213};
214
215static dtrace_pattr_t profile_attr = {
216{ DTRACE_STABILITY_EVOLVING, DTRACE_STABILITY_EVOLVING, DTRACE_CLASS_COMMON },
217{ DTRACE_STABILITY_PRIVATE, DTRACE_STABILITY_PRIVATE, DTRACE_CLASS_UNKNOWN },
218{ DTRACE_STABILITY_PRIVATE, DTRACE_STABILITY_PRIVATE, DTRACE_CLASS_ISA },
219{ DTRACE_STABILITY_EVOLVING, DTRACE_STABILITY_EVOLVING, DTRACE_CLASS_COMMON },
220{ DTRACE_STABILITY_PRIVATE, DTRACE_STABILITY_PRIVATE, DTRACE_CLASS_ISA },
221};
222
223static dtrace_pops_t profile_pops = {
224	.dtps_provide =		profile_provide,
225	.dtps_provide_module =	NULL,
226	.dtps_enable =		profile_enable,
227	.dtps_disable =		profile_disable,
228	.dtps_suspend =		NULL,
229	.dtps_resume =		NULL,
230	.dtps_getargdesc =	NULL,
231	.dtps_getargval =	NULL,
232	.dtps_usermode =	NULL,
233	.dtps_destroy =		profile_destroy
234};
235
236static struct cdev		*profile_cdev;
237static dtrace_provider_id_t	profile_id;
238static hrtime_t			profile_interval_min = NANOSEC / 5000;	/* 5000 hz */
239static int			profile_aframes = PROF_ARTIFICIAL_FRAMES;
240
241SYSCTL_DECL(_kern_dtrace);
242SYSCTL_NODE(_kern_dtrace, OID_AUTO, profile, CTLFLAG_RD, 0, "DTrace profile parameters");
243SYSCTL_INT(_kern_dtrace_profile, OID_AUTO, aframes, CTLFLAG_RW, &profile_aframes,
244    0, "Skipped frames for profile provider");
245
246static sbintime_t
247nsec_to_sbt(hrtime_t nsec)
248{
249	time_t sec;
250
251	/*
252	 * We need to calculate nsec * 2^32 / 10^9
253	 * Seconds and nanoseconds are split to avoid overflow.
254	 */
255	sec = nsec / NANOSEC;
256	nsec = nsec % NANOSEC;
257	return (((sbintime_t)sec << 32) | ((sbintime_t)nsec << 32) / NANOSEC);
258}
259
260static hrtime_t
261sbt_to_nsec(sbintime_t sbt)
262{
263
264	return ((sbt >> 32) * NANOSEC +
265	    (((uint32_t)sbt * (hrtime_t)NANOSEC) >> 32));
266}
267
268static void
269profile_fire(void *arg)
270{
271	profile_probe_percpu_t *pcpu = arg;
272	profile_probe_t *prof = pcpu->profc_probe;
273	hrtime_t late;
274	struct trapframe *frame;
275	uintfptr_t pc, upc;
276
277#ifdef illumos
278	late = gethrtime() - pcpu->profc_expected;
279#else
280	late = sbt_to_nsec(sbinuptime() - pcpu->profc_expected);
281#endif
282
283	pc = 0;
284	upc = 0;
285
286	/*
287	 * td_intr_frame can be unset if this is a catch up event
288	 * after waking up from idle sleep.
289	 * This can only happen on a CPU idle thread.
290	 */
291	frame = curthread->td_intr_frame;
292	if (frame != NULL) {
293		if (TRAPF_USERMODE(frame))
294			upc = TRAPF_PC(frame);
295		else
296			pc = TRAPF_PC(frame);
297	}
298	dtrace_probe(prof->prof_id, pc, upc, late, 0, 0);
299
300	pcpu->profc_expected += pcpu->profc_interval;
301	callout_schedule_sbt_curcpu(&pcpu->profc_cyclic,
302	    pcpu->profc_expected, 0, C_DIRECT_EXEC | C_ABSOLUTE);
303}
304
305static void
306profile_tick(void *arg)
307{
308	profile_probe_t *prof = arg;
309	struct trapframe *frame;
310	uintfptr_t pc, upc;
311
312	pc = 0;
313	upc = 0;
314
315	/*
316	 * td_intr_frame can be unset if this is a catch up event
317	 * after waking up from idle sleep.
318	 * This can only happen on a CPU idle thread.
319	 */
320	frame = curthread->td_intr_frame;
321	if (frame != NULL) {
322		if (TRAPF_USERMODE(frame))
323			upc = TRAPF_PC(frame);
324		else
325			pc = TRAPF_PC(frame);
326	}
327	dtrace_probe(prof->prof_id, pc, upc, 0, 0, 0);
328
329	prof->prof_expected += prof->prof_interval;
330	callout_schedule_sbt(&prof->prof_cyclic,
331	    prof->prof_expected, 0, C_DIRECT_EXEC | C_ABSOLUTE);
332}
333
334static void
335profile_create(hrtime_t interval, char *name, int kind)
336{
337	profile_probe_t *prof;
338
339	if (interval < profile_interval_min)
340		return;
341
342	if (dtrace_probe_lookup(profile_id, NULL, NULL, name) != 0)
343		return;
344
345	atomic_add_32(&profile_total, 1);
346	if (profile_total > profile_max) {
347		atomic_add_32(&profile_total, -1);
348		return;
349	}
350
351	prof = kmem_zalloc(sizeof (profile_probe_t), KM_SLEEP);
352	(void) strcpy(prof->prof_name, name);
353#ifdef illumos
354	prof->prof_interval = interval;
355	prof->prof_cyclic = CYCLIC_NONE;
356#else
357	prof->prof_interval = nsec_to_sbt(interval);
358	callout_init(&prof->prof_cyclic, 1);
359#endif
360	prof->prof_kind = kind;
361	prof->prof_id = dtrace_probe_create(profile_id,
362	    NULL, NULL, name,
363	    profile_aframes, prof);
364}
365
366/*ARGSUSED*/
367static void
368profile_provide(void *arg, dtrace_probedesc_t *desc)
369{
370	int i, j, rate, kind;
371	hrtime_t val = 0, mult = 1, len = 0;
372	char *name, *suffix = NULL;
373
374	const struct {
375		char *prefix;
376		int kind;
377	} types[] = {
378		{ PROF_PREFIX_PROFILE, PROF_PROFILE },
379		{ PROF_PREFIX_TICK, PROF_TICK },
380		{ 0, 0 }
381	};
382
383	const struct {
384		char *name;
385		hrtime_t mult;
386	} suffixes[] = {
387		{ "ns", 	NANOSEC / NANOSEC },
388		{ "nsec",	NANOSEC / NANOSEC },
389		{ "us",		NANOSEC / MICROSEC },
390		{ "usec",	NANOSEC / MICROSEC },
391		{ "ms",		NANOSEC / MILLISEC },
392		{ "msec",	NANOSEC / MILLISEC },
393		{ "s",		NANOSEC / SEC },
394		{ "sec",	NANOSEC / SEC },
395		{ "m",		NANOSEC * (hrtime_t)60 },
396		{ "min",	NANOSEC * (hrtime_t)60 },
397		{ "h",		NANOSEC * (hrtime_t)(60 * 60) },
398		{ "hour",	NANOSEC * (hrtime_t)(60 * 60) },
399		{ "d",		NANOSEC * (hrtime_t)(24 * 60 * 60) },
400		{ "day",	NANOSEC * (hrtime_t)(24 * 60 * 60) },
401		{ "hz",		0 },
402		{ NULL }
403	};
404
405	if (desc == NULL) {
406		char n[PROF_NAMELEN];
407
408		/*
409		 * If no description was provided, provide all of our probes.
410		 */
411		for (i = 0; i < sizeof (profile_rates) / sizeof (int); i++) {
412			if ((rate = profile_rates[i]) == 0)
413				continue;
414
415			(void) snprintf(n, PROF_NAMELEN, "%s%d",
416			    PROF_PREFIX_PROFILE, rate);
417			profile_create(NANOSEC / rate, n, PROF_PROFILE);
418		}
419
420		for (i = 0; i < sizeof (profile_ticks) / sizeof (int); i++) {
421			if ((rate = profile_ticks[i]) == 0)
422				continue;
423
424			(void) snprintf(n, PROF_NAMELEN, "%s%d",
425			    PROF_PREFIX_TICK, rate);
426			profile_create(NANOSEC / rate, n, PROF_TICK);
427		}
428
429		return;
430	}
431
432	name = desc->dtpd_name;
433
434	for (i = 0; types[i].prefix != NULL; i++) {
435		len = strlen(types[i].prefix);
436
437		if (strncmp(name, types[i].prefix, len) != 0)
438			continue;
439		break;
440	}
441
442	if (types[i].prefix == NULL)
443		return;
444
445	kind = types[i].kind;
446	j = strlen(name) - len;
447
448	/*
449	 * We need to start before any time suffix.
450	 */
451	for (j = strlen(name); j >= len; j--) {
452		if (name[j] >= '0' && name[j] <= '9')
453			break;
454		suffix = &name[j];
455	}
456
457	ASSERT(suffix != NULL);
458
459	/*
460	 * Now determine the numerical value present in the probe name.
461	 */
462	for (; j >= len; j--) {
463		if (name[j] < '0' || name[j] > '9')
464			return;
465
466		val += (name[j] - '0') * mult;
467		mult *= (hrtime_t)10;
468	}
469
470	if (val == 0)
471		return;
472
473	/*
474	 * Look-up the suffix to determine the multiplier.
475	 */
476	for (i = 0, mult = 0; suffixes[i].name != NULL; i++) {
477		if (strcasecmp(suffixes[i].name, suffix) == 0) {
478			mult = suffixes[i].mult;
479			break;
480		}
481	}
482
483	if (suffixes[i].name == NULL && *suffix != '\0')
484		return;
485
486	if (mult == 0) {
487		/*
488		 * The default is frequency-per-second.
489		 */
490		val = NANOSEC / val;
491	} else {
492		val *= mult;
493	}
494
495	profile_create(val, name, kind);
496}
497
498/* ARGSUSED */
499static void
500profile_destroy(void *arg, dtrace_id_t id, void *parg)
501{
502	profile_probe_t *prof = parg;
503
504#ifdef illumos
505	ASSERT(prof->prof_cyclic == CYCLIC_NONE);
506#else
507	ASSERT(!callout_active(&prof->prof_cyclic) && prof->prof_pcpus == NULL);
508#endif
509	kmem_free(prof, sizeof (profile_probe_t));
510
511	ASSERT(profile_total >= 1);
512	atomic_add_32(&profile_total, -1);
513}
514
515#ifdef illumos
516/*ARGSUSED*/
517static void
518profile_online(void *arg, cpu_t *cpu, cyc_handler_t *hdlr, cyc_time_t *when)
519{
520	profile_probe_t *prof = arg;
521	profile_probe_percpu_t *pcpu;
522
523	pcpu = kmem_zalloc(sizeof (profile_probe_percpu_t), KM_SLEEP);
524	pcpu->profc_probe = prof;
525
526	hdlr->cyh_func = profile_fire;
527	hdlr->cyh_arg = pcpu;
528
529	when->cyt_interval = prof->prof_interval;
530	when->cyt_when = gethrtime() + when->cyt_interval;
531
532	pcpu->profc_expected = when->cyt_when;
533	pcpu->profc_interval = when->cyt_interval;
534}
535
536/*ARGSUSED*/
537static void
538profile_offline(void *arg, cpu_t *cpu, void *oarg)
539{
540	profile_probe_percpu_t *pcpu = oarg;
541
542	ASSERT(pcpu->profc_probe == arg);
543	kmem_free(pcpu, sizeof (profile_probe_percpu_t));
544}
545
546/* ARGSUSED */
547static void
548profile_enable(void *arg, dtrace_id_t id, void *parg)
549{
550	profile_probe_t *prof = parg;
551	cyc_omni_handler_t omni;
552	cyc_handler_t hdlr;
553	cyc_time_t when;
554
555	ASSERT(prof->prof_interval != 0);
556	ASSERT(MUTEX_HELD(&cpu_lock));
557
558	if (prof->prof_kind == PROF_TICK) {
559		hdlr.cyh_func = profile_tick;
560		hdlr.cyh_arg = prof;
561
562		when.cyt_interval = prof->prof_interval;
563		when.cyt_when = gethrtime() + when.cyt_interval;
564	} else {
565		ASSERT(prof->prof_kind == PROF_PROFILE);
566		omni.cyo_online = profile_online;
567		omni.cyo_offline = profile_offline;
568		omni.cyo_arg = prof;
569	}
570
571	if (prof->prof_kind == PROF_TICK) {
572		prof->prof_cyclic = cyclic_add(&hdlr, &when);
573	} else {
574		prof->prof_cyclic = cyclic_add_omni(&omni);
575	}
576}
577
578/* ARGSUSED */
579static void
580profile_disable(void *arg, dtrace_id_t id, void *parg)
581{
582	profile_probe_t *prof = parg;
583
584	ASSERT(prof->prof_cyclic != CYCLIC_NONE);
585	ASSERT(MUTEX_HELD(&cpu_lock));
586
587	cyclic_remove(prof->prof_cyclic);
588	prof->prof_cyclic = CYCLIC_NONE;
589}
590
591#else
592
593static void
594profile_enable_omni(profile_probe_t *prof)
595{
596	profile_probe_percpu_t *pcpu;
597	int cpu;
598
599	prof->prof_pcpus = kmem_zalloc((mp_maxid + 1) * sizeof(pcpu), KM_SLEEP);
600	CPU_FOREACH(cpu) {
601		pcpu = kmem_zalloc(sizeof(profile_probe_percpu_t), KM_SLEEP);
602		prof->prof_pcpus[cpu] = pcpu;
603		pcpu->profc_probe = prof;
604		pcpu->profc_expected = sbinuptime() + prof->prof_interval;
605		pcpu->profc_interval = prof->prof_interval;
606		callout_init(&pcpu->profc_cyclic, 1);
607		callout_reset_sbt_on(&pcpu->profc_cyclic,
608		    pcpu->profc_expected, 0, profile_fire, pcpu,
609		    cpu, C_DIRECT_EXEC | C_ABSOLUTE);
610	}
611}
612
613static void
614profile_disable_omni(profile_probe_t *prof)
615{
616	profile_probe_percpu_t *pcpu;
617	int cpu;
618
619	ASSERT(prof->prof_pcpus != NULL);
620	CPU_FOREACH(cpu) {
621		pcpu = prof->prof_pcpus[cpu];
622		ASSERT(pcpu->profc_probe == prof);
623		ASSERT(callout_active(&pcpu->profc_cyclic));
624		callout_stop(&pcpu->profc_cyclic);
625		callout_drain(&pcpu->profc_cyclic);
626		kmem_free(pcpu, sizeof(profile_probe_percpu_t));
627	}
628	kmem_free(prof->prof_pcpus, (mp_maxid + 1) * sizeof(pcpu));
629	prof->prof_pcpus = NULL;
630}
631
632/* ARGSUSED */
633static void
634profile_enable(void *arg, dtrace_id_t id, void *parg)
635{
636	profile_probe_t *prof = parg;
637
638	if (prof->prof_kind == PROF_TICK) {
639		prof->prof_expected = sbinuptime() + prof->prof_interval;
640		callout_reset_sbt(&prof->prof_cyclic,
641		    prof->prof_expected, 0, profile_tick, prof,
642		    C_DIRECT_EXEC | C_ABSOLUTE);
643	} else {
644		ASSERT(prof->prof_kind == PROF_PROFILE);
645		profile_enable_omni(prof);
646	}
647}
648
649/* ARGSUSED */
650static void
651profile_disable(void *arg, dtrace_id_t id, void *parg)
652{
653	profile_probe_t *prof = parg;
654
655	if (prof->prof_kind == PROF_TICK) {
656		ASSERT(callout_active(&prof->prof_cyclic));
657		callout_stop(&prof->prof_cyclic);
658		callout_drain(&prof->prof_cyclic);
659	} else {
660		ASSERT(prof->prof_kind == PROF_PROFILE);
661		profile_disable_omni(prof);
662	}
663}
664#endif
665
666static void
667profile_load(void *dummy)
668{
669	/* Create the /dev/dtrace/profile entry. */
670	profile_cdev = make_dev(&profile_cdevsw, 0, UID_ROOT, GID_WHEEL, 0600,
671	    "dtrace/profile");
672
673	if (dtrace_register("profile", &profile_attr, DTRACE_PRIV_USER,
674	    NULL, &profile_pops, NULL, &profile_id) != 0)
675		return;
676}
677
678
679static int
680profile_unload()
681{
682	int error = 0;
683
684	if ((error = dtrace_unregister(profile_id)) != 0)
685		return (error);
686
687	destroy_dev(profile_cdev);
688
689	return (error);
690}
691
692/* ARGSUSED */
693static int
694profile_modevent(module_t mod __unused, int type, void *data __unused)
695{
696	int error = 0;
697
698	switch (type) {
699	case MOD_LOAD:
700		break;
701
702	case MOD_UNLOAD:
703		break;
704
705	case MOD_SHUTDOWN:
706		break;
707
708	default:
709		error = EOPNOTSUPP;
710		break;
711
712	}
713	return (error);
714}
715
716/* ARGSUSED */
717static int
718profile_open(struct cdev *dev __unused, int oflags __unused, int devtype __unused, struct thread *td __unused)
719{
720	return (0);
721}
722
723SYSINIT(profile_load, SI_SUB_DTRACE_PROVIDER, SI_ORDER_ANY, profile_load, NULL);
724SYSUNINIT(profile_unload, SI_SUB_DTRACE_PROVIDER, SI_ORDER_ANY, profile_unload, NULL);
725
726DEV_MODULE(profile, profile_modevent, NULL);
727MODULE_VERSION(profile, 1);
728MODULE_DEPEND(profile, dtrace, 1, 1, 1);
729MODULE_DEPEND(profile, opensolaris, 1, 1, 1);
730