1/* $NetBSD: profile.c,v 1.11 2020/05/15 23:57:17 ad Exp $ */ 2 3/* 4 * CDDL HEADER START 5 * 6 * The contents of this file are subject to the terms of the 7 * Common Development and Distribution License (the "License"). 8 * You may not use this file except in compliance with the License. 9 * 10 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 11 * or http://www.opensolaris.org/os/licensing. 12 * See the License for the specific language governing permissions 13 * and limitations under the License. 14 * 15 * When distributing Covered Code, include this CDDL HEADER in each 16 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 17 * If applicable, add the following below this CDDL HEADER, with the 18 * fields enclosed by brackets "[]" replaced with your own identifying 19 * information: Portions Copyright [yyyy] [name of copyright owner] 20 * 21 * CDDL HEADER END 22 * 23 * Portions Copyright 2006-2008 John Birrell jb@freebsd.org 24 * 25 * $FreeBSD: head/sys/cddl/dev/profile/profile.c 300618 2016-05-24 16:41:37Z br $ 26 * 27 */ 28 29/* 30 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 31 * Use is subject to license terms. 32 */ 33 34#include <sys/cdefs.h> 35#include <sys/param.h> 36#include <sys/systm.h> 37#include <sys/conf.h> 38#include <sys/cpuvar.h> 39#include <sys/fcntl.h> 40#include <sys/filio.h> 41#ifdef __FreeBSD__ 42#include <sys/kdb.h> 43#endif 44#include <sys/kernel.h> 45#include <sys/kmem.h> 46#include <sys/kthread.h> 47#ifdef __FreeBSD__ 48#include <sys/limits.h> 49#endif 50#include <sys/linker.h> 51#include <sys/lock.h> 52#include <sys/malloc.h> 53#include <sys/module.h> 54#include <sys/mutex.h> 55#include <sys/poll.h> 56#include <sys/proc.h> 57#include <sys/selinfo.h> 58#ifdef __FreeBSD__ 59#include <sys/smp.h> 60#include <sys/sysctl.h> 61#endif 62#include <sys/uio.h> 63#include <sys/unistd.h> 64#ifdef __FreeBSD__ 65#include <machine/cpu.h> 66#include <machine/stdarg.h> 67#endif 68 69#ifdef __NetBSD__ 70#include <sys/syslimits.h> 71#include <sys/atomic.h> 72#include <sys/cpu.h> 73#include <sys/cyclic.h> 74#endif 75 76#include <sys/dtrace.h> 77#include <sys/dtrace_bsd.h> 78 79#define PROF_NAMELEN 15 80 81#define PROF_PROFILE 0 82#define PROF_TICK 1 83#define PROF_PREFIX_PROFILE "profile-" 84#define PROF_PREFIX_TICK "tick-" 85 86/* 87 * Regardless of platform, there are five artificial frames in the case of the 88 * profile provider: 89 * 90 * profile_fire 91 * cyclic_expire 92 * cyclic_fire 93 * [ cbe ] 94 * [ locore ] 95 * 96 * On amd64, there are two frames associated with locore: one in locore, and 97 * another in common interrupt dispatch code. (i386 has not been modified to 98 * use this common layer.) Further, on i386, the interrupted instruction 99 * appears as its own stack frame. All of this means that we need to add one 100 * frame for amd64, and then take one away for both amd64 and i386. 101 * 102 * On SPARC, the picture is further complicated because the compiler 103 * optimizes away tail-calls -- so the following frames are optimized away: 104 * 105 * profile_fire 106 * cyclic_expire 107 * 108 * This gives three frames. However, on DEBUG kernels, the cyclic_expire 109 * frame cannot be tail-call eliminated, yielding four frames in this case. 110 * 111 * All of the above constraints lead to the mess below. Yes, the profile 112 * provider should ideally figure this out on-the-fly by hiting one of its own 113 * probes and then walking its own stack trace. This is complicated, however, 114 * and the static definition doesn't seem to be overly brittle. Still, we 115 * allow for a manual override in case we get it completely wrong. 116 */ 117#ifdef __FreeBSD__ 118#ifdef __amd64 119#define PROF_ARTIFICIAL_FRAMES 10 120#else 121#ifdef __i386 122#define PROF_ARTIFICIAL_FRAMES 6 123#else 124#ifdef __sparc 125#ifdef DEBUG 126#define PROF_ARTIFICIAL_FRAMES 4 127#else 128#define PROF_ARTIFICIAL_FRAMES 3 129#endif 130#endif 131#endif 132#endif 133 134#ifdef __mips 135/* 136 * This value is bogus just to make module compilable on mips 137 */ 138#define PROF_ARTIFICIAL_FRAMES 3 139#endif 140 141#ifdef __powerpc__ 142/* 143 * This value is bogus just to make module compilable on powerpc 144 */ 145#define PROF_ARTIFICIAL_FRAMES 3 146#endif 147 148struct profile_probe_percpu; 149 150#ifdef __mips 151/* bogus */ 152#define PROF_ARTIFICIAL_FRAMES 3 153#endif 154 155#ifdef __arm__ 156#define PROF_ARTIFICIAL_FRAMES 3 157#endif 158 159#ifdef __aarch64__ 160/* TODO: verify */ 161#define PROF_ARTIFICIAL_FRAMES 10 162#endif 163 164#ifdef __riscv__ 165/* TODO: verify */ 166#define PROF_ARTIFICIAL_FRAMES 10 167#endif 168 169#endif /* __FreeBSD__ */ 170 171#ifdef __NetBSD__ 172#define PROF_ARTIFICIAL_FRAMES 4 173#endif 174 175typedef struct profile_probe { 176 char prof_name[PROF_NAMELEN]; 177 dtrace_id_t prof_id; 178 int prof_kind; 179#if defined(illumos) || defined(__NetBSD__) 180 hrtime_t prof_interval; 181 cyclic_id_t prof_cyclic; 182#endif 183#ifdef __FreeBSD__ 184 sbintime_t prof_interval; 185 struct callout prof_cyclic; 186 sbintime_t prof_expected; 187 struct profile_probe_percpu **prof_pcpus; 188#endif 189} profile_probe_t; 190 191typedef struct profile_probe_percpu { 192 hrtime_t profc_expected; 193 hrtime_t profc_interval; 194 profile_probe_t *profc_probe; 195#ifdef __FreeBSD__ 196 struct callout profc_cyclic; 197#endif 198} profile_probe_percpu_t; 199 200#ifdef __FreeBSD__ 201static d_open_t profile_open; 202#endif 203static int profile_unload(void); 204static void profile_create(hrtime_t, char *, int); 205static void profile_destroy(void *, dtrace_id_t, void *); 206static int profile_enable(void *, dtrace_id_t, void *); 207static void profile_disable(void *, dtrace_id_t, void *); 208static void profile_load(void *); 209static void profile_provide(void *, dtrace_probedesc_t *); 210 211static int profile_rates[] = { 212 97, 199, 499, 997, 1999, 213 4001, 4999, 0, 0, 0, 214 0, 0, 0, 0, 0, 215 0, 0, 0, 0, 0 216}; 217 218static int profile_ticks[] = { 219 1, 10, 100, 500, 1000, 220 5000, 0, 0, 0, 0, 221 0, 0, 0, 0, 0 222}; 223 224/* 225 * profile_max defines the upper bound on the number of profile probes that 226 * can exist (this is to prevent malicious or clumsy users from exhausing 227 * system resources by creating a slew of profile probes). At mod load time, 228 * this gets its value from PROFILE_MAX_DEFAULT or profile-max-probes if it's 229 * present in the profile.conf file. 230 */ 231#define PROFILE_MAX_DEFAULT 1000 /* default max. number of probes */ 232static uint32_t profile_max = PROFILE_MAX_DEFAULT; 233 /* maximum number of profile probes */ 234static uint32_t profile_total; /* current number of profile probes */ 235 236#ifdef __FreeBSD__ 237static struct cdevsw profile_cdevsw = { 238 .d_version = D_VERSION, 239 .d_open = profile_open, 240 .d_name = "profile", 241}; 242#endif 243 244static dtrace_pattr_t profile_attr = { 245{ DTRACE_STABILITY_EVOLVING, DTRACE_STABILITY_EVOLVING, DTRACE_CLASS_COMMON }, 246{ DTRACE_STABILITY_PRIVATE, DTRACE_STABILITY_PRIVATE, DTRACE_CLASS_UNKNOWN }, 247{ DTRACE_STABILITY_PRIVATE, DTRACE_STABILITY_PRIVATE, DTRACE_CLASS_ISA }, 248{ DTRACE_STABILITY_EVOLVING, DTRACE_STABILITY_EVOLVING, DTRACE_CLASS_COMMON }, 249{ DTRACE_STABILITY_PRIVATE, DTRACE_STABILITY_PRIVATE, DTRACE_CLASS_ISA }, 250}; 251 252static dtrace_pops_t profile_pops = { 253 profile_provide, 254 NULL, 255 profile_enable, 256 profile_disable, 257 NULL, 258 NULL, 259 NULL, 260 NULL, 261 NULL, 262 profile_destroy 263}; 264 265#ifdef __FreeBSD__ 266static struct cdev *profile_cdev; 267#endif 268static dtrace_provider_id_t profile_id; 269static hrtime_t profile_interval_min = NANOSEC / 5000; /* 5000 hz */ 270static int profile_aframes = PROF_ARTIFICIAL_FRAMES; 271 272#ifdef __FreeBSD__ 273SYSCTL_DECL(_kern_dtrace); 274SYSCTL_NODE(_kern_dtrace, OID_AUTO, profile, CTLFLAG_RD, 0, "DTrace profile parameters"); 275SYSCTL_INT(_kern_dtrace_profile, OID_AUTO, aframes, CTLFLAG_RW, &profile_aframes, 276 0, "Skipped frames for profile provider"); 277 278static sbintime_t 279nsec_to_sbt(hrtime_t nsec) 280{ 281 time_t sec; 282 283 /* 284 * We need to calculate nsec * 2^32 / 10^9 285 * Seconds and nanoseconds are split to avoid overflow. 286 */ 287 sec = nsec / NANOSEC; 288 nsec = nsec % NANOSEC; 289 return (((sbintime_t)sec << 32) | ((sbintime_t)nsec << 32) / NANOSEC); 290} 291 292static hrtime_t 293sbt_to_nsec(sbintime_t sbt) 294{ 295 296 return ((sbt >> 32) * NANOSEC + 297 (((uint32_t)sbt * (hrtime_t)NANOSEC) >> 32)); 298} 299 300static void 301profile_fire(void *arg) 302{ 303 profile_probe_percpu_t *pcpu = arg; 304 profile_probe_t *prof = pcpu->profc_probe; 305 hrtime_t late; 306 struct trapframe *frame; 307 uintfptr_t pc, upc; 308 309#ifdef illumos 310 late = gethrtime() - pcpu->profc_expected; 311#else 312 late = sbt_to_nsec(sbinuptime() - pcpu->profc_expected); 313#endif 314 315 pc = 0; 316 upc = 0; 317 318 /* 319 * td_intr_frame can be unset if this is a catch up event 320 * after waking up from idle sleep. 321 * This can only happen on a CPU idle thread. 322 */ 323 frame = curthread->td_intr_frame; 324 if (frame != NULL) { 325 if (TRAPF_USERMODE(frame)) 326 upc = TRAPF_PC(frame); 327 else 328 pc = TRAPF_PC(frame); 329 } 330 dtrace_probe(prof->prof_id, pc, upc, late, 0, 0); 331 332 pcpu->profc_expected += pcpu->profc_interval; 333 callout_schedule_sbt_curcpu(&pcpu->profc_cyclic, 334 pcpu->profc_expected, 0, C_DIRECT_EXEC | C_ABSOLUTE); 335} 336 337static void 338profile_tick(void *arg) 339{ 340 profile_probe_t *prof = arg; 341 struct trapframe *frame; 342 uintfptr_t pc, upc; 343 344 pc = 0; 345 upc = 0; 346 347 /* 348 * td_intr_frame can be unset if this is a catch up event 349 * after waking up from idle sleep. 350 * This can only happen on a CPU idle thread. 351 */ 352 frame = curthread->td_intr_frame; 353 if (frame != NULL) { 354 if (TRAPF_USERMODE(frame)) 355 upc = TRAPF_PC(frame); 356 else 357 pc = TRAPF_PC(frame); 358 } 359 dtrace_probe(prof->prof_id, pc, upc, 0, 0, 0); 360 361 prof->prof_expected += prof->prof_interval; 362 callout_schedule_sbt(&prof->prof_cyclic, 363 prof->prof_expected, 0, C_DIRECT_EXEC | C_ABSOLUTE); 364} 365 366#endif 367 368#ifdef __NetBSD__ 369static void 370profile_fire(void *arg) 371{ 372 profile_probe_percpu_t *pcpu = arg; 373 profile_probe_t *prof = pcpu->profc_probe; 374 hrtime_t late; 375 solaris_cpu_t *c = &solaris_cpu[cpu_number()]; 376 377 late = gethrtime() - pcpu->profc_expected; 378 pcpu->profc_expected += pcpu->profc_interval; 379 380 dtrace_probe(prof->prof_id, c->cpu_profile_pc, 381 c->cpu_profile_upc, late, 0, 0); 382} 383 384static void 385profile_tick(void *arg) 386{ 387 profile_probe_t *prof = arg; 388 solaris_cpu_t *c = &solaris_cpu[cpu_number()]; 389 390 dtrace_probe(prof->prof_id, c->cpu_profile_pc, 391 c->cpu_profile_upc, 0, 0, 0); 392} 393 394#endif 395 396static void 397profile_create(hrtime_t interval, char *name, int kind) 398{ 399 profile_probe_t *prof; 400 401 if (interval < profile_interval_min) 402 return; 403 404 if (dtrace_probe_lookup(profile_id, NULL, NULL, name) != 0) 405 return; 406 407 atomic_add_32(&profile_total, 1); 408 if (profile_total > profile_max) { 409 atomic_add_32(&profile_total, -1); 410 return; 411 } 412 413 prof = kmem_zalloc(sizeof (profile_probe_t), KM_SLEEP); 414 (void) strcpy(prof->prof_name, name); 415#ifdef __FreeBSD__ 416 prof->prof_interval = nsec_to_sbt(interval); 417 callout_init(&prof->prof_cyclic, 1); 418#else 419 prof->prof_interval = interval; 420 prof->prof_cyclic = CYCLIC_NONE; 421#endif 422 prof->prof_kind = kind; 423 prof->prof_id = dtrace_probe_create(profile_id, 424 NULL, NULL, name, 425 profile_aframes, prof); 426} 427 428/*ARGSUSED*/ 429static void 430profile_provide(void *arg, dtrace_probedesc_t *desc) 431{ 432 int i, j, rate, kind; 433 hrtime_t val = 0, mult = 1, len = 0; 434 char *name, *suffix = NULL; 435 436 const struct { 437 char *prefix; 438 int kind; 439 } types[] = { 440 { PROF_PREFIX_PROFILE, PROF_PROFILE }, 441 { PROF_PREFIX_TICK, PROF_TICK }, 442 { 0, 0 } 443 }; 444 445 const struct { 446 char *name; 447 hrtime_t mult; 448 } suffixes[] = { 449 { "ns", NANOSEC / NANOSEC }, 450 { "nsec", NANOSEC / NANOSEC }, 451 { "us", NANOSEC / MICROSEC }, 452 { "usec", NANOSEC / MICROSEC }, 453 { "ms", NANOSEC / MILLISEC }, 454 { "msec", NANOSEC / MILLISEC }, 455 { "s", NANOSEC / SEC }, 456 { "sec", NANOSEC / SEC }, 457 { "m", NANOSEC * (hrtime_t)60 }, 458 { "min", NANOSEC * (hrtime_t)60 }, 459 { "h", NANOSEC * (hrtime_t)(60 * 60) }, 460 { "hour", NANOSEC * (hrtime_t)(60 * 60) }, 461 { "d", NANOSEC * (hrtime_t)(24 * 60 * 60) }, 462 { "day", NANOSEC * (hrtime_t)(24 * 60 * 60) }, 463 { "hz", 0 }, 464 { NULL, 0 } 465 }; 466 467 if (desc == NULL) { 468 char n[PROF_NAMELEN]; 469 470 /* 471 * If no description was provided, provide all of our probes. 472 */ 473 for (i = 0; i < sizeof (profile_rates) / sizeof (int); i++) { 474 if ((rate = profile_rates[i]) == 0) 475 continue; 476 477 (void) snprintf(n, PROF_NAMELEN, "%s%d", 478 PROF_PREFIX_PROFILE, rate); 479 profile_create(NANOSEC / rate, n, PROF_PROFILE); 480 } 481 482 for (i = 0; i < sizeof (profile_ticks) / sizeof (int); i++) { 483 if ((rate = profile_ticks[i]) == 0) 484 continue; 485 486 (void) snprintf(n, PROF_NAMELEN, "%s%d", 487 PROF_PREFIX_TICK, rate); 488 profile_create(NANOSEC / rate, n, PROF_TICK); 489 } 490 491 return; 492 } 493 494 name = desc->dtpd_name; 495 496 for (i = 0; types[i].prefix != NULL; i++) { 497 len = strlen(types[i].prefix); 498 499 if (strncmp(name, types[i].prefix, len) != 0) 500 continue; 501 break; 502 } 503 504 if (types[i].prefix == NULL) 505 return; 506 507 kind = types[i].kind; 508 j = strlen(name) - len; 509 510 /* 511 * We need to start before any time suffix. 512 */ 513 for (j = strlen(name); j >= len; j--) { 514 if (name[j] >= '0' && name[j] <= '9') 515 break; 516 suffix = &name[j]; 517 } 518 519 ASSERT(suffix != NULL); 520 521 /* 522 * Now determine the numerical value present in the probe name. 523 */ 524 for (; j >= len; j--) { 525 if (name[j] < '0' || name[j] > '9') 526 return; 527 528 val += (name[j] - '0') * mult; 529 mult *= (hrtime_t)10; 530 } 531 532 if (val == 0) 533 return; 534 535 /* 536 * Look-up the suffix to determine the multiplier. 537 */ 538 for (i = 0, mult = 0; suffixes[i].name != NULL; i++) { 539 if (strcasecmp(suffixes[i].name, suffix) == 0) { 540 mult = suffixes[i].mult; 541 break; 542 } 543 } 544 545 if (suffixes[i].name == NULL && *suffix != '\0') 546 return; 547 548 if (mult == 0) { 549 /* 550 * The default is frequency-per-second. 551 */ 552 val = NANOSEC / val; 553 } else { 554 val *= mult; 555 } 556 557 profile_create(val, name, kind); 558} 559 560/* ARGSUSED */ 561static void 562profile_destroy(void *arg, dtrace_id_t id, void *parg) 563{ 564 profile_probe_t *prof = parg; 565 566#ifdef __FreeBSD__ 567 ASSERT(!callout_active(&prof->prof_cyclic) && prof->prof_pcpus == NULL); 568#else 569 ASSERT(prof->prof_cyclic == CYCLIC_NONE); 570#endif 571 kmem_free(prof, sizeof (profile_probe_t)); 572 573 ASSERT(profile_total >= 1); 574 atomic_add_32(&profile_total, -1); 575} 576 577#ifndef __FreeBSD__ 578 579/*ARGSUSED*/ 580static void 581profile_online(void *arg, cpu_t *cpu, cyc_handler_t *hdlr, cyc_time_t *when) 582{ 583 profile_probe_t *prof = arg; 584 profile_probe_percpu_t *pcpu; 585 586 pcpu = kmem_zalloc(sizeof (profile_probe_percpu_t), KM_SLEEP); 587 pcpu->profc_probe = prof; 588 589 hdlr->cyh_func = profile_fire; 590 hdlr->cyh_arg = pcpu; 591 592 when->cyt_interval = prof->prof_interval; 593 when->cyt_when = gethrtime() + when->cyt_interval; 594 595 pcpu->profc_expected = when->cyt_when; 596 pcpu->profc_interval = when->cyt_interval; 597} 598 599/*ARGSUSED*/ 600static void 601profile_offline(void *arg, cpu_t *cpu, void *oarg) 602{ 603 profile_probe_percpu_t *pcpu = oarg; 604 605 ASSERT(pcpu->profc_probe == arg); 606 kmem_free(pcpu, sizeof (profile_probe_percpu_t)); 607} 608 609/* ARGSUSED */ 610static int 611profile_enable(void *arg, dtrace_id_t id, void *parg) 612{ 613 profile_probe_t *prof = parg; 614 cyc_omni_handler_t omni; 615 cyc_handler_t hdlr; 616 cyc_time_t when; 617 618 ASSERT(prof->prof_interval != 0); 619 ASSERT(MUTEX_HELD(&cpu_lock)); 620 621 if (prof->prof_kind == PROF_TICK) { 622 hdlr.cyh_func = profile_tick; 623 hdlr.cyh_arg = prof; 624 625 when.cyt_interval = prof->prof_interval; 626 when.cyt_when = gethrtime() + when.cyt_interval; 627 } else { 628 ASSERT(prof->prof_kind == PROF_PROFILE); 629 omni.cyo_online = profile_online; 630 omni.cyo_offline = profile_offline; 631 omni.cyo_arg = prof; 632 } 633 634 if (prof->prof_kind == PROF_TICK) { 635 prof->prof_cyclic = cyclic_add(&hdlr, &when); 636 } else { 637 prof->prof_cyclic = cyclic_add_omni(&omni); 638 } 639 return 0; 640} 641 642/* ARGSUSED */ 643static void 644profile_disable(void *arg, dtrace_id_t id, void *parg) 645{ 646 profile_probe_t *prof = parg; 647 648 ASSERT(prof->prof_cyclic != CYCLIC_NONE); 649 ASSERT(MUTEX_HELD(&cpu_lock)); 650 651 cyclic_remove(prof->prof_cyclic); 652 prof->prof_cyclic = CYCLIC_NONE; 653} 654 655#else 656 657static void 658profile_enable_omni(profile_probe_t *prof) 659{ 660 profile_probe_percpu_t *pcpu; 661 int cpu; 662 663 prof->prof_pcpus = kmem_zalloc((mp_maxid + 1) * sizeof(pcpu), KM_SLEEP); 664 CPU_FOREACH(cpu) { 665 pcpu = kmem_zalloc(sizeof(profile_probe_percpu_t), KM_SLEEP); 666 prof->prof_pcpus[cpu] = pcpu; 667 pcpu->profc_probe = prof; 668 pcpu->profc_expected = sbinuptime() + prof->prof_interval; 669 pcpu->profc_interval = prof->prof_interval; 670 callout_init(&pcpu->profc_cyclic, 1); 671 callout_reset_sbt_on(&pcpu->profc_cyclic, 672 pcpu->profc_expected, 0, profile_fire, pcpu, 673 cpu, C_DIRECT_EXEC | C_ABSOLUTE); 674 } 675} 676 677static void 678profile_disable_omni(profile_probe_t *prof) 679{ 680 profile_probe_percpu_t *pcpu; 681 int cpu; 682 683 ASSERT(prof->prof_pcpus != NULL); 684 CPU_FOREACH(cpu) { 685 pcpu = prof->prof_pcpus[cpu]; 686 ASSERT(pcpu->profc_probe == prof); 687 ASSERT(callout_active(&pcpu->profc_cyclic)); 688 callout_stop(&pcpu->profc_cyclic); 689 callout_drain(&pcpu->profc_cyclic); 690 kmem_free(pcpu, sizeof(profile_probe_percpu_t)); 691 } 692 kmem_free(prof->prof_pcpus, (mp_maxid + 1) * sizeof(pcpu)); 693 prof->prof_pcpus = NULL; 694} 695 696/* ARGSUSED */ 697static void 698profile_enable(void *arg, dtrace_id_t id, void *parg) 699{ 700 profile_probe_t *prof = parg; 701 702 if (prof->prof_kind == PROF_TICK) { 703 prof->prof_expected = sbinuptime() + prof->prof_interval; 704 callout_reset_sbt(&prof->prof_cyclic, 705 prof->prof_expected, 0, profile_tick, prof, 706 C_DIRECT_EXEC | C_ABSOLUTE); 707 } else { 708 ASSERT(prof->prof_kind == PROF_PROFILE); 709 profile_enable_omni(prof); 710 } 711} 712 713/* ARGSUSED */ 714static void 715profile_disable(void *arg, dtrace_id_t id, void *parg) 716{ 717 profile_probe_t *prof = parg; 718 719 if (prof->prof_kind == PROF_TICK) { 720 ASSERT(callout_active(&prof->prof_cyclic)); 721 callout_stop(&prof->prof_cyclic); 722 callout_drain(&prof->prof_cyclic); 723 } else { 724 ASSERT(prof->prof_kind == PROF_PROFILE); 725 profile_disable_omni(prof); 726 } 727} 728#endif 729 730static void 731profile_load(void *dummy) 732{ 733#ifdef __FreeBSD__ 734 /* Create the /dev/dtrace/profile entry. */ 735 profile_cdev = make_dev(&profile_cdevsw, 0, UID_ROOT, GID_WHEEL, 0600, 736 "dtrace/profile"); 737#endif 738 739 if (dtrace_register("profile", &profile_attr, DTRACE_PRIV_USER, 740 NULL, &profile_pops, NULL, &profile_id) != 0) 741 return; 742} 743 744 745static int 746profile_unload() 747{ 748 int error = 0; 749 750 if ((error = dtrace_unregister(profile_id)) != 0) 751 return (error); 752 753#ifdef __FreeBSD__ 754 destroy_dev(profile_cdev); 755#endif 756 757 return (error); 758} 759 760#ifdef __FreeBSD__ 761 762/* ARGSUSED */ 763static int 764profile_modevent(module_t mod __unused, int type, void *data __unused) 765{ 766 int error = 0; 767 768 switch (type) { 769 case MOD_LOAD: 770 break; 771 772 case MOD_UNLOAD: 773 break; 774 775 case MOD_SHUTDOWN: 776 break; 777 778 default: 779 error = EOPNOTSUPP; 780 break; 781 782 } 783 return (error); 784} 785 786/* ARGSUSED */ 787static int 788profile_open(struct cdev *dev __unused, int oflags __unused, int devtype __unused, struct thread *td __unused) 789{ 790 return (0); 791} 792 793SYSINIT(profile_load, SI_SUB_DTRACE_PROVIDER, SI_ORDER_ANY, profile_load, NULL); 794SYSUNINIT(profile_unload, SI_SUB_DTRACE_PROVIDER, SI_ORDER_ANY, profile_unload, NULL); 795 796DEV_MODULE(profile, profile_modevent, NULL); 797MODULE_VERSION(profile, 1); 798MODULE_DEPEND(profile, dtrace, 1, 1, 1); 799MODULE_DEPEND(profile, cyclic, 1, 1, 1); 800MODULE_DEPEND(profile, opensolaris, 1, 1, 1); 801 802#endif 803 804#ifdef __NetBSD__ 805 806static int 807dtrace_profile_modcmd(modcmd_t cmd, void *data) 808{ 809 switch (cmd) { 810 case MODULE_CMD_INIT: 811 profile_load(NULL); 812 return 0; 813 814 case MODULE_CMD_FINI: 815 profile_unload(); 816 return 0; 817 818 case MODULE_CMD_AUTOUNLOAD: 819 if (profile_total) 820 return EBUSY; 821 return 0; 822 823 default: 824 return ENOTTY; 825 } 826} 827 828MODULE(MODULE_CLASS_MISC, dtrace_profile, "dtrace,cyclic"); 829 830#endif 831