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 * $FreeBSD$ 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 129 130 struct 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 150 151 typedef 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; 165 166 typedef 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; 174 175 static d_open_t profile_open; 176 static int profile_unload(void); 177 static void profile_create(hrtime_t, char *, int); 178 static void profile_destroy(void *, dtrace_id_t, void *); 179 static void profile_enable(void *, dtrace_id_t, void *); 180 static void profile_disable(void *, dtrace_id_t, void *); 181 static void profile_load(void *); 182 static void profile_provide(void *, dtrace_probedesc_t *); 183 184 static 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 }; 190 191 static 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 */ 205 static uint32_t profile_max = PROFILE_MAX_DEFAULT; 206 /* maximum number of profile probes */ 207 static uint32_t profile_total; /* current number of profile probes */ 208 209 static struct cdevsw profile_cdevsw = { 210 .d_version = D_VERSION, 211 .d_open = profile_open, 212 .d_name = "profile", 213 }; 214 215 static 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 }; 222 223 static 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 }; 235 236 static struct cdev *profile_cdev; 237 static dtrace_provider_id_t profile_id; 238 static hrtime_t profile_interval_min = NANOSEC / 5000; /* 5000 hz */ 239 static int profile_aframes = PROF_ARTIFICIAL_FRAMES; 240 241 SYSCTL_DECL(_kern_dtrace); 242 SYSCTL_NODE(_kern_dtrace, OID_AUTO, profile, CTLFLAG_RD, 0, "DTrace profile parameters"); 243 SYSCTL_INT(_kern_dtrace_profile, OID_AUTO, aframes, CTLFLAG_RW, &profile_aframes, 244 0, "Skipped frames for profile provider"); 245 246 static sbintime_t 247 nsec_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 } 259 260 static hrtime_t 261 sbt_to_nsec(sbintime_t sbt) 262 { 263 264 return ((sbt >> 32) * NANOSEC + 265 (((uint32_t)sbt * (hrtime_t)NANOSEC) >> 32)); 266 } 267 268 static void 269 profile_probe(profile_probe_t *prof, hrtime_t late) 270 { 271 struct thread *td; 272 struct trapframe *frame; 273 uintfptr_t pc, upc; 274 275 td = curthread; 276 pc = upc = 0; 277 278 /* 279 * td_intr_frame can be unset if this is a catch-up event upon waking up 280 * from idle sleep. This can only happen on a CPU idle thread. Use a 281 * representative arg0 value in this case so that one of the probe 282 * arguments is non-zero. 283 */ 284 frame = td->td_intr_frame; 285 if (frame != NULL) { 286 if (TRAPF_USERMODE(frame)) 287 upc = TRAPF_PC(frame); 288 else 289 pc = TRAPF_PC(frame); 290 } else if (TD_IS_IDLETHREAD(td)) 291 pc = (uintfptr_t)&cpu_idle; 292 293 dtrace_probe(prof->prof_id, pc, upc, late, 0, 0); 294 } 295 296 static void 297 profile_fire(void *arg) 298 { 299 profile_probe_percpu_t *pcpu = arg; 300 profile_probe_t *prof = pcpu->profc_probe; 301 hrtime_t late; 302 303 late = sbt_to_nsec(sbinuptime() - pcpu->profc_expected); 304 305 profile_probe(prof, late); 306 pcpu->profc_expected += pcpu->profc_interval; 307 callout_schedule_sbt_curcpu(&pcpu->profc_cyclic, 308 pcpu->profc_expected, 0, C_DIRECT_EXEC | C_ABSOLUTE); 309 } 310 311 static void 312 profile_tick(void *arg) 313 { 314 profile_probe_t *prof = arg; 315 316 profile_probe(prof, 0); 317 prof->prof_expected += prof->prof_interval; 318 callout_schedule_sbt(&prof->prof_cyclic, 319 prof->prof_expected, 0, C_DIRECT_EXEC | C_ABSOLUTE); 320 } 321 322 static void 323 profile_create(hrtime_t interval, char *name, int kind) 324 { 325 profile_probe_t *prof; 326 327 if (interval < profile_interval_min) 328 return; 329 330 if (dtrace_probe_lookup(profile_id, NULL, NULL, name) != 0) 331 return; 332 333 atomic_add_32(&profile_total, 1); 334 if (profile_total > profile_max) { 335 atomic_add_32(&profile_total, -1); 336 return; 337 } 338 339 prof = kmem_zalloc(sizeof (profile_probe_t), KM_SLEEP); 340 (void) strcpy(prof->prof_name, name); 341 #ifdef illumos 342 prof->prof_interval = interval; 343 prof->prof_cyclic = CYCLIC_NONE; 344 #else 345 prof->prof_interval = nsec_to_sbt(interval); 346 callout_init(&prof->prof_cyclic, 1); 347 #endif 348 prof->prof_kind = kind; 349 prof->prof_id = dtrace_probe_create(profile_id, 350 NULL, NULL, name, 351 profile_aframes, prof); 352 } 353 354 /*ARGSUSED*/ 355 static void 356 profile_provide(void *arg, dtrace_probedesc_t *desc) 357 { 358 int i, j, rate, kind; 359 hrtime_t val = 0, mult = 1, len = 0; 360 char *name, *suffix = NULL; 361 362 const struct { 363 char *prefix; 364 int kind; 365 } types[] = { 366 { PROF_PREFIX_PROFILE, PROF_PROFILE }, 367 { PROF_PREFIX_TICK, PROF_TICK }, 368 { 0, 0 } 369 }; 370 371 const struct { 372 char *name; 373 hrtime_t mult; 374 } suffixes[] = { 375 { "ns", NANOSEC / NANOSEC }, 376 { "nsec", NANOSEC / NANOSEC }, 377 { "us", NANOSEC / MICROSEC }, 378 { "usec", NANOSEC / MICROSEC }, 379 { "ms", NANOSEC / MILLISEC }, 380 { "msec", NANOSEC / MILLISEC }, 381 { "s", NANOSEC / SEC }, 382 { "sec", NANOSEC / SEC }, 383 { "m", NANOSEC * (hrtime_t)60 }, 384 { "min", NANOSEC * (hrtime_t)60 }, 385 { "h", NANOSEC * (hrtime_t)(60 * 60) }, 386 { "hour", NANOSEC * (hrtime_t)(60 * 60) }, 387 { "d", NANOSEC * (hrtime_t)(24 * 60 * 60) }, 388 { "day", NANOSEC * (hrtime_t)(24 * 60 * 60) }, 389 { "hz", 0 }, 390 { NULL } 391 }; 392 393 if (desc == NULL) { 394 char n[PROF_NAMELEN]; 395 396 /* 397 * If no description was provided, provide all of our probes. 398 */ 399 for (i = 0; i < sizeof (profile_rates) / sizeof (int); i++) { 400 if ((rate = profile_rates[i]) == 0) 401 continue; 402 403 (void) snprintf(n, PROF_NAMELEN, "%s%d", 404 PROF_PREFIX_PROFILE, rate); 405 profile_create(NANOSEC / rate, n, PROF_PROFILE); 406 } 407 408 for (i = 0; i < sizeof (profile_ticks) / sizeof (int); i++) { 409 if ((rate = profile_ticks[i]) == 0) 410 continue; 411 412 (void) snprintf(n, PROF_NAMELEN, "%s%d", 413 PROF_PREFIX_TICK, rate); 414 profile_create(NANOSEC / rate, n, PROF_TICK); 415 } 416 417 return; 418 } 419 420 name = desc->dtpd_name; 421 422 for (i = 0; types[i].prefix != NULL; i++) { 423 len = strlen(types[i].prefix); 424 425 if (strncmp(name, types[i].prefix, len) != 0) 426 continue; 427 break; 428 } 429 430 if (types[i].prefix == NULL) 431 return; 432 433 kind = types[i].kind; 434 j = strlen(name) - len; 435 436 /* 437 * We need to start before any time suffix. 438 */ 439 for (j = strlen(name); j >= len; j--) { 440 if (name[j] >= '0' && name[j] <= '9') 441 break; 442 suffix = &name[j]; 443 } 444 445 ASSERT(suffix != NULL); 446 447 /* 448 * Now determine the numerical value present in the probe name. 449 */ 450 for (; j >= len; j--) { 451 if (name[j] < '0' || name[j] > '9') 452 return; 453 454 val += (name[j] - '0') * mult; 455 mult *= (hrtime_t)10; 456 } 457 458 if (val == 0) 459 return; 460 461 /* 462 * Look-up the suffix to determine the multiplier. 463 */ 464 for (i = 0, mult = 0; suffixes[i].name != NULL; i++) { 465 if (strcasecmp(suffixes[i].name, suffix) == 0) { 466 mult = suffixes[i].mult; 467 break; 468 } 469 } 470 471 if (suffixes[i].name == NULL && *suffix != '\0') 472 return; 473 474 if (mult == 0) { 475 /* 476 * The default is frequency-per-second. 477 */ 478 val = NANOSEC / val; 479 } else { 480 val *= mult; 481 } 482 483 profile_create(val, name, kind); 484 } 485 486 /* ARGSUSED */ 487 static void 488 profile_destroy(void *arg, dtrace_id_t id, void *parg) 489 { 490 profile_probe_t *prof = parg; 491 492 #ifdef illumos 493 ASSERT(prof->prof_cyclic == CYCLIC_NONE); 494 #else 495 ASSERT(!callout_active(&prof->prof_cyclic) && prof->prof_pcpus == NULL); 496 #endif 497 kmem_free(prof, sizeof (profile_probe_t)); 498 499 ASSERT(profile_total >= 1); 500 atomic_add_32(&profile_total, -1); 501 } 502 503 #ifdef illumos 504 /*ARGSUSED*/ 505 static void 506 profile_online(void *arg, cpu_t *cpu, cyc_handler_t *hdlr, cyc_time_t *when) 507 { 508 profile_probe_t *prof = arg; 509 profile_probe_percpu_t *pcpu; 510 511 pcpu = kmem_zalloc(sizeof (profile_probe_percpu_t), KM_SLEEP); 512 pcpu->profc_probe = prof; 513 514 hdlr->cyh_func = profile_fire; 515 hdlr->cyh_arg = pcpu; 516 517 when->cyt_interval = prof->prof_interval; 518 when->cyt_when = gethrtime() + when->cyt_interval; 519 520 pcpu->profc_expected = when->cyt_when; 521 pcpu->profc_interval = when->cyt_interval; 522 } 523 524 /*ARGSUSED*/ 525 static void 526 profile_offline(void *arg, cpu_t *cpu, void *oarg) 527 { 528 profile_probe_percpu_t *pcpu = oarg; 529 530 ASSERT(pcpu->profc_probe == arg); 531 kmem_free(pcpu, sizeof (profile_probe_percpu_t)); 532 } 533 534 /* ARGSUSED */ 535 static void 536 profile_enable(void *arg, dtrace_id_t id, void *parg) 537 { 538 profile_probe_t *prof = parg; 539 cyc_omni_handler_t omni; 540 cyc_handler_t hdlr; 541 cyc_time_t when; 542 543 ASSERT(prof->prof_interval != 0); 544 ASSERT(MUTEX_HELD(&cpu_lock)); 545 546 if (prof->prof_kind == PROF_TICK) { 547 hdlr.cyh_func = profile_tick; 548 hdlr.cyh_arg = prof; 549 550 when.cyt_interval = prof->prof_interval; 551 when.cyt_when = gethrtime() + when.cyt_interval; 552 } else { 553 ASSERT(prof->prof_kind == PROF_PROFILE); 554 omni.cyo_online = profile_online; 555 omni.cyo_offline = profile_offline; 556 omni.cyo_arg = prof; 557 } 558 559 if (prof->prof_kind == PROF_TICK) { 560 prof->prof_cyclic = cyclic_add(&hdlr, &when); 561 } else { 562 prof->prof_cyclic = cyclic_add_omni(&omni); 563 } 564 } 565 566 /* ARGSUSED */ 567 static void 568 profile_disable(void *arg, dtrace_id_t id, void *parg) 569 { 570 profile_probe_t *prof = parg; 571 572 ASSERT(prof->prof_cyclic != CYCLIC_NONE); 573 ASSERT(MUTEX_HELD(&cpu_lock)); 574 575 cyclic_remove(prof->prof_cyclic); 576 prof->prof_cyclic = CYCLIC_NONE; 577 } 578 579 #else 580 581 static void 582 profile_enable_omni(profile_probe_t *prof) 583 { 584 profile_probe_percpu_t *pcpu; 585 int cpu; 586 587 prof->prof_pcpus = kmem_zalloc((mp_maxid + 1) * sizeof(pcpu), KM_SLEEP); 588 CPU_FOREACH(cpu) { 589 pcpu = kmem_zalloc(sizeof(profile_probe_percpu_t), KM_SLEEP); 590 prof->prof_pcpus[cpu] = pcpu; 591 pcpu->profc_probe = prof; 592 pcpu->profc_expected = sbinuptime() + prof->prof_interval; 593 pcpu->profc_interval = prof->prof_interval; 594 callout_init(&pcpu->profc_cyclic, 1); 595 callout_reset_sbt_on(&pcpu->profc_cyclic, 596 pcpu->profc_expected, 0, profile_fire, pcpu, 597 cpu, C_DIRECT_EXEC | C_ABSOLUTE); 598 } 599 } 600 601 static void 602 profile_disable_omni(profile_probe_t *prof) 603 { 604 profile_probe_percpu_t *pcpu; 605 int cpu; 606 607 ASSERT(prof->prof_pcpus != NULL); 608 CPU_FOREACH(cpu) { 609 pcpu = prof->prof_pcpus[cpu]; 610 ASSERT(pcpu->profc_probe == prof); 611 ASSERT(callout_active(&pcpu->profc_cyclic)); 612 callout_stop(&pcpu->profc_cyclic); 613 callout_drain(&pcpu->profc_cyclic); 614 kmem_free(pcpu, sizeof(profile_probe_percpu_t)); 615 } 616 kmem_free(prof->prof_pcpus, (mp_maxid + 1) * sizeof(pcpu)); 617 prof->prof_pcpus = NULL; 618 } 619 620 /* ARGSUSED */ 621 static void 622 profile_enable(void *arg, dtrace_id_t id, void *parg) 623 { 624 profile_probe_t *prof = parg; 625 626 if (prof->prof_kind == PROF_TICK) { 627 prof->prof_expected = sbinuptime() + prof->prof_interval; 628 callout_reset_sbt(&prof->prof_cyclic, 629 prof->prof_expected, 0, profile_tick, prof, 630 C_DIRECT_EXEC | C_ABSOLUTE); 631 } else { 632 ASSERT(prof->prof_kind == PROF_PROFILE); 633 profile_enable_omni(prof); 634 } 635 } 636 637 /* ARGSUSED */ 638 static void 639 profile_disable(void *arg, dtrace_id_t id, void *parg) 640 { 641 profile_probe_t *prof = parg; 642 643 if (prof->prof_kind == PROF_TICK) { 644 ASSERT(callout_active(&prof->prof_cyclic)); 645 callout_stop(&prof->prof_cyclic); 646 callout_drain(&prof->prof_cyclic); 647 } else { 648 ASSERT(prof->prof_kind == PROF_PROFILE); 649 profile_disable_omni(prof); 650 } 651 } 652 #endif 653 654 static void 655 profile_load(void *dummy) 656 { 657 /* Create the /dev/dtrace/profile entry. */ 658 profile_cdev = make_dev(&profile_cdevsw, 0, UID_ROOT, GID_WHEEL, 0600, 659 "dtrace/profile"); 660 661 if (dtrace_register("profile", &profile_attr, DTRACE_PRIV_USER, 662 NULL, &profile_pops, NULL, &profile_id) != 0) 663 return; 664 } 665 666 667 static int 668 profile_unload() 669 { 670 int error = 0; 671 672 if ((error = dtrace_unregister(profile_id)) != 0) 673 return (error); 674 675 destroy_dev(profile_cdev); 676 677 return (error); 678 } 679 680 /* ARGSUSED */ 681 static int 682 profile_modevent(module_t mod __unused, int type, void *data __unused) 683 { 684 int error = 0; 685 686 switch (type) { 687 case MOD_LOAD: 688 break; 689 690 case MOD_UNLOAD: 691 break; 692 693 case MOD_SHUTDOWN: 694 break; 695 696 default: 697 error = EOPNOTSUPP; 698 break; 699 700 } 701 return (error); 702 } 703 704 /* ARGSUSED */ 705 static int 706 profile_open(struct cdev *dev __unused, int oflags __unused, int devtype __unused, struct thread *td __unused) 707 { 708 return (0); 709 } 710 711 SYSINIT(profile_load, SI_SUB_DTRACE_PROVIDER, SI_ORDER_ANY, profile_load, NULL); 712 SYSUNINIT(profile_unload, SI_SUB_DTRACE_PROVIDER, SI_ORDER_ANY, profile_unload, NULL); 713 714 DEV_MODULE(profile, profile_modevent, NULL); 715 MODULE_VERSION(profile, 1); 716 MODULE_DEPEND(profile, dtrace, 1, 1, 1); 717 MODULE_DEPEND(profile, opensolaris, 1, 1, 1); 718