profile.c

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    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/endian.h>
   38 #include <sys/fcntl.h>
   39 #include <sys/filio.h>
   40 #include <sys/kdb.h>
   41 #include <sys/kernel.h>
   42 #include <sys/kmem.h>
   43 #include <sys/kthread.h>
   44 #include <sys/limits.h>
   45 #include <sys/linker.h>
   46 #include <sys/lock.h>
   47 #include <sys/malloc.h>
   48 #include <sys/module.h>
   49 #include <sys/mutex.h>
   50 #include <sys/poll.h>
   51 #include <sys/proc.h>
   52 #include <sys/selinfo.h>
   53 #include <sys/smp.h>
   54 #include <sys/sysctl.h>
   55 #include <sys/uio.h>
   56 #include <sys/unistd.h>
   57 #include <machine/cpu.h>
   58 #include <machine/stdarg.h>
   59 
   60 #include <sys/dtrace.h>
   61 #include <sys/dtrace_bsd.h>
   62 
   63 #define PROF_NAMELEN            15
   64 
   65 #define PROF_PROFILE            0
   66 #define PROF_TICK               1
   67 #define PROF_PREFIX_PROFILE     "profile-"
   68 #define PROF_PREFIX_TICK        "tick-"
   69 
   70 /*
   71  * Regardless of platform, there are five artificial frames in the case of the
   72  * profile provider:
   73  *
   74  *      profile_fire
   75  *      cyclic_expire
   76  *      cyclic_fire
   77  *      [ cbe ]
   78  *      [ locore ]
   79  *
   80  * On amd64, there are two frames associated with locore:  one in locore, and
   81  * another in common interrupt dispatch code.  (i386 has not been modified to
   82  * use this common layer.)  Further, on i386, the interrupted instruction
   83  * appears as its own stack frame.  All of this means that we need to add one
   84  * frame for amd64, and then take one away for both amd64 and i386.
   85  *
   86  * All of the above constraints lead to the mess below.  Yes, the profile
   87  * provider should ideally figure this out on-the-fly by hiting one of its own
   88  * probes and then walking its own stack trace.  This is complicated, however,
   89  * and the static definition doesn't seem to be overly brittle.  Still, we
   90  * allow for a manual override in case we get it completely wrong.
   91  */
   92 #ifdef __amd64
   93 #define PROF_ARTIFICIAL_FRAMES  10
   94 #else
   95 #ifdef __i386
   96 #define PROF_ARTIFICIAL_FRAMES  6
   97 #endif
   98 #endif
   99 
  100 #ifdef __powerpc__
  101 /*
  102  * This value is bogus just to make module compilable on powerpc
  103  */
  104 #define PROF_ARTIFICIAL_FRAMES  3
  105 #endif
  106 
  107 struct profile_probe_percpu;
  108 
  109 #ifdef __arm__
  110 #define PROF_ARTIFICIAL_FRAMES  3
  111 #endif
  112 
  113 #ifdef __aarch64__
  114 #define PROF_ARTIFICIAL_FRAMES  12
  115 #endif
  116 
  117 #ifdef __riscv
  118 #define PROF_ARTIFICIAL_FRAMES  12
  119 #endif
  120 
  121 typedef struct profile_probe {
  122         char            prof_name[PROF_NAMELEN];
  123         dtrace_id_t     prof_id;
  124         int             prof_kind;
  125 #ifdef illumos
  126         hrtime_t        prof_interval;
  127         cyclic_id_t     prof_cyclic;
  128 #else
  129         sbintime_t      prof_interval;
  130         struct callout  prof_cyclic;
  131         sbintime_t      prof_expected;
  132         struct profile_probe_percpu **prof_pcpus;
  133 #endif
  134 } profile_probe_t;
  135 
  136 typedef struct profile_probe_percpu {
  137         hrtime_t        profc_expected;
  138         hrtime_t        profc_interval;
  139         profile_probe_t *profc_probe;
  140 #ifdef __FreeBSD__
  141         struct callout  profc_cyclic;
  142 #endif
  143 } profile_probe_percpu_t;
  144 
  145 static int      profile_unload(void);
  146 static void     profile_create(hrtime_t, char *, int);
  147 static void     profile_destroy(void *, dtrace_id_t, void *);
  148 static void     profile_enable(void *, dtrace_id_t, void *);
  149 static void     profile_disable(void *, dtrace_id_t, void *);
  150 static void     profile_load(void *);
  151 static void     profile_provide(void *, dtrace_probedesc_t *);
  152 
  153 static int profile_rates[] = {
  154     97, 199, 499, 997, 1999,
  155     4001, 4999, 0, 0, 0,
  156     0, 0, 0, 0, 0,
  157     0, 0, 0, 0, 0
  158 };
  159 
  160 static int profile_ticks[] = {
  161     1, 10, 100, 500, 1000,
  162     5000, 0, 0, 0, 0,
  163     0, 0, 0, 0, 0
  164 };
  165 
  166 /*
  167  * profile_max defines the upper bound on the number of profile probes that
  168  * can exist (this is to prevent malicious or clumsy users from exhausing
  169  * system resources by creating a slew of profile probes). At mod load time,
  170  * this gets its value from PROFILE_MAX_DEFAULT or profile-max-probes if it's
  171  * present in the profile.conf file.
  172  */
  173 #define PROFILE_MAX_DEFAULT     1000    /* default max. number of probes */
  174 static uint32_t profile_max = PROFILE_MAX_DEFAULT;
  175                                         /* maximum number of profile probes */
  176 static uint32_t profile_total;          /* current number of profile probes */
  177 
  178 static dtrace_pattr_t profile_attr = {
  179 { DTRACE_STABILITY_EVOLVING, DTRACE_STABILITY_EVOLVING, DTRACE_CLASS_COMMON },
  180 { DTRACE_STABILITY_PRIVATE, DTRACE_STABILITY_PRIVATE, DTRACE_CLASS_UNKNOWN },
  181 { DTRACE_STABILITY_PRIVATE, DTRACE_STABILITY_PRIVATE, DTRACE_CLASS_ISA },
  182 { DTRACE_STABILITY_EVOLVING, DTRACE_STABILITY_EVOLVING, DTRACE_CLASS_COMMON },
  183 { DTRACE_STABILITY_PRIVATE, DTRACE_STABILITY_PRIVATE, DTRACE_CLASS_ISA },
  184 };
  185 
  186 static dtrace_pops_t profile_pops = {
  187         .dtps_provide =         profile_provide,
  188         .dtps_provide_module =  NULL,
  189         .dtps_enable =          profile_enable,
  190         .dtps_disable =         profile_disable,
  191         .dtps_suspend =         NULL,
  192         .dtps_resume =          NULL,
  193         .dtps_getargdesc =      NULL,
  194         .dtps_getargval =       NULL,
  195         .dtps_usermode =        NULL,
  196         .dtps_destroy =         profile_destroy
  197 };
  198 
  199 static dtrace_provider_id_t     profile_id;
  200 static hrtime_t                 profile_interval_min = NANOSEC / 5000;  /* 5000 hz */
  201 static int                      profile_aframes = PROF_ARTIFICIAL_FRAMES;
  202 
  203 SYSCTL_DECL(_kern_dtrace);
  204 SYSCTL_NODE(_kern_dtrace, OID_AUTO, profile, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
  205     "DTrace profile parameters");
  206 SYSCTL_INT(_kern_dtrace_profile, OID_AUTO, aframes, CTLFLAG_RW, &profile_aframes,
  207     0, "Skipped frames for profile provider");
  208 
  209 static sbintime_t
  210 nsec_to_sbt(hrtime_t nsec)
  211 {
  212         time_t sec;
  213 
  214         /*
  215          * We need to calculate nsec * 2^32 / 10^9
  216          * Seconds and nanoseconds are split to avoid overflow.
  217          */
  218         sec = nsec / NANOSEC;
  219         nsec = nsec % NANOSEC;
  220         return (((sbintime_t)sec << 32) | ((sbintime_t)nsec << 32) / NANOSEC);
  221 }
  222 
  223 static hrtime_t
  224 sbt_to_nsec(sbintime_t sbt)
  225 {
  226 
  227         return ((sbt >> 32) * NANOSEC +
  228             (((uint32_t)sbt * (hrtime_t)NANOSEC) >> 32));
  229 }
  230 
  231 static void
  232 profile_probe(profile_probe_t *prof, hrtime_t late)
  233 {
  234         struct thread *td;
  235         struct trapframe *frame;
  236         uintfptr_t pc, upc;
  237 
  238         td = curthread;
  239         pc = upc = 0;
  240 
  241         /*
  242          * td_intr_frame can be unset if this is a catch-up event upon waking up
  243          * from idle sleep. This can only happen on a CPU idle thread. Use a
  244          * representative arg0 value in this case so that one of the probe
  245          * arguments is non-zero.
  246          */
  247         frame = td->td_intr_frame;
  248         if (frame != NULL) {
  249                 if (TRAPF_USERMODE(frame))
  250                         upc = TRAPF_PC(frame);
  251                 else
  252                         pc = TRAPF_PC(frame);
  253         } else if (TD_IS_IDLETHREAD(td))
  254                 pc = (uintfptr_t)&cpu_idle;
  255 
  256         dtrace_probe(prof->prof_id, pc, upc, late, 0, 0);
  257 }
  258 
  259 static void
  260 profile_fire(void *arg)
  261 {
  262         profile_probe_percpu_t *pcpu = arg;
  263         profile_probe_t *prof = pcpu->profc_probe;
  264         hrtime_t late;
  265 
  266         late = sbt_to_nsec(sbinuptime() - pcpu->profc_expected);
  267 
  268         profile_probe(prof, late);
  269         pcpu->profc_expected += pcpu->profc_interval;
  270         callout_schedule_sbt_curcpu(&pcpu->profc_cyclic,
  271             pcpu->profc_expected, 0, C_DIRECT_EXEC | C_ABSOLUTE);
  272 }
  273 
  274 static void
  275 profile_tick(void *arg)
  276 {
  277         profile_probe_t *prof = arg;
  278 
  279         profile_probe(prof, 0);
  280         prof->prof_expected += prof->prof_interval;
  281         callout_schedule_sbt(&prof->prof_cyclic,
  282             prof->prof_expected, 0, C_DIRECT_EXEC | C_ABSOLUTE);
  283 }
  284 
  285 static void
  286 profile_create(hrtime_t interval, char *name, int kind)
  287 {
  288         profile_probe_t *prof;
  289 
  290         if (interval < profile_interval_min)
  291                 return;
  292 
  293         if (dtrace_probe_lookup(profile_id, NULL, NULL, name) != 0)
  294                 return;
  295 
  296         atomic_add_32(&profile_total, 1);
  297         if (profile_total > profile_max) {
  298                 atomic_add_32(&profile_total, -1);
  299                 return;
  300         }
  301 
  302         prof = kmem_zalloc(sizeof (profile_probe_t), KM_SLEEP);
  303         (void) strcpy(prof->prof_name, name);
  304 #ifdef illumos
  305         prof->prof_interval = interval;
  306         prof->prof_cyclic = CYCLIC_NONE;
  307 #else
  308         prof->prof_interval = nsec_to_sbt(interval);
  309         callout_init(&prof->prof_cyclic, 1);
  310 #endif
  311         prof->prof_kind = kind;
  312         prof->prof_id = dtrace_probe_create(profile_id,
  313             NULL, NULL, name,
  314             profile_aframes, prof);
  315 }
  316 
  317 /*ARGSUSED*/
  318 static void
  319 profile_provide(void *arg, dtrace_probedesc_t *desc)
  320 {
  321         int i, j, rate, kind;
  322         hrtime_t val = 0, mult = 1, len = 0;
  323         char *name, *suffix = NULL;
  324 
  325         const struct {
  326                 char *prefix;
  327                 int kind;
  328         } types[] = {
  329                 { PROF_PREFIX_PROFILE, PROF_PROFILE },
  330                 { PROF_PREFIX_TICK, PROF_TICK },
  331                 { 0, 0 }
  332         };
  333 
  334         const struct {
  335                 char *name;
  336                 hrtime_t mult;
  337         } suffixes[] = {
  338                 { "ns",         NANOSEC / NANOSEC },
  339                 { "nsec",       NANOSEC / NANOSEC },
  340                 { "us",         NANOSEC / MICROSEC },
  341                 { "usec",       NANOSEC / MICROSEC },
  342                 { "ms",         NANOSEC / MILLISEC },
  343                 { "msec",       NANOSEC / MILLISEC },
  344                 { "s",          NANOSEC / SEC },
  345                 { "sec",        NANOSEC / SEC },
  346                 { "m",          NANOSEC * (hrtime_t)60 },
  347                 { "min",        NANOSEC * (hrtime_t)60 },
  348                 { "h",          NANOSEC * (hrtime_t)(60 * 60) },
  349                 { "hour",       NANOSEC * (hrtime_t)(60 * 60) },
  350                 { "d",          NANOSEC * (hrtime_t)(24 * 60 * 60) },
  351                 { "day",        NANOSEC * (hrtime_t)(24 * 60 * 60) },
  352                 { "hz",         0 },
  353                 { NULL }
  354         };
  355 
  356         if (desc == NULL) {
  357                 char n[PROF_NAMELEN];
  358 
  359                 /*
  360                  * If no description was provided, provide all of our probes.
  361                  */
  362                 for (i = 0; i < sizeof (profile_rates) / sizeof (int); i++) {
  363                         if ((rate = profile_rates[i]) == 0)
  364                                 continue;
  365 
  366                         (void) snprintf(n, PROF_NAMELEN, "%s%d",
  367                             PROF_PREFIX_PROFILE, rate);
  368                         profile_create(NANOSEC / rate, n, PROF_PROFILE);
  369                 }
  370 
  371                 for (i = 0; i < sizeof (profile_ticks) / sizeof (int); i++) {
  372                         if ((rate = profile_ticks[i]) == 0)
  373                                 continue;
  374 
  375                         (void) snprintf(n, PROF_NAMELEN, "%s%d",
  376                             PROF_PREFIX_TICK, rate);
  377                         profile_create(NANOSEC / rate, n, PROF_TICK);
  378                 }
  379 
  380                 return;
  381         }
  382 
  383         name = desc->dtpd_name;
  384 
  385         for (i = 0; types[i].prefix != NULL; i++) {
  386                 len = strlen(types[i].prefix);
  387 
  388                 if (strncmp(name, types[i].prefix, len) != 0)
  389                         continue;
  390                 break;
  391         }
  392 
  393         if (types[i].prefix == NULL)
  394                 return;
  395 
  396         kind = types[i].kind;
  397         j = strlen(name) - len;
  398 
  399         /*
  400          * We need to start before any time suffix.
  401          */
  402         for (j = strlen(name); j >= len; j--) {
  403                 if (name[j] >= '' && name[j] <= '9')
  404                         break;
  405                 suffix = &name[j];
  406         }
  407 
  408         ASSERT(suffix != NULL);
  409 
  410         /*
  411          * Now determine the numerical value present in the probe name.
  412          */
  413         for (; j >= len; j--) {
  414                 if (name[j] < '' || name[j] > '9')
  415                         return;
  416 
  417                 val += (name[j] - '') * mult;
  418                 mult *= (hrtime_t)10;
  419         }
  420 
  421         if (val == 0)
  422                 return;
  423 
  424         /*
  425          * Look-up the suffix to determine the multiplier.
  426          */
  427         for (i = 0, mult = 0; suffixes[i].name != NULL; i++) {
  428                 if (strcasecmp(suffixes[i].name, suffix) == 0) {
  429                         mult = suffixes[i].mult;
  430                         break;
  431                 }
  432         }
  433 
  434         if (suffixes[i].name == NULL && *suffix != '\0')
  435                 return;
  436 
  437         if (mult == 0) {
  438                 /*
  439                  * The default is frequency-per-second.
  440                  */
  441                 val = NANOSEC / val;
  442         } else {
  443                 val *= mult;
  444         }
  445 
  446         profile_create(val, name, kind);
  447 }
  448 
  449 /* ARGSUSED */
  450 static void
  451 profile_destroy(void *arg, dtrace_id_t id, void *parg)
  452 {
  453         profile_probe_t *prof = parg;
  454 
  455 #ifdef illumos
  456         ASSERT(prof->prof_cyclic == CYCLIC_NONE);
  457 #else
  458         ASSERT(!callout_active(&prof->prof_cyclic) && prof->prof_pcpus == NULL);
  459 #endif
  460         kmem_free(prof, sizeof (profile_probe_t));
  461 
  462         ASSERT(profile_total >= 1);
  463         atomic_add_32(&profile_total, -1);
  464 }
  465 
  466 #ifdef illumos
  467 /*ARGSUSED*/
  468 static void
  469 profile_online(void *arg, cpu_t *cpu, cyc_handler_t *hdlr, cyc_time_t *when)
  470 {
  471         profile_probe_t *prof = arg;
  472         profile_probe_percpu_t *pcpu;
  473 
  474         pcpu = kmem_zalloc(sizeof (profile_probe_percpu_t), KM_SLEEP);
  475         pcpu->profc_probe = prof;
  476 
  477         hdlr->cyh_func = profile_fire;
  478         hdlr->cyh_arg = pcpu;
  479 
  480         when->cyt_interval = prof->prof_interval;
  481         when->cyt_when = gethrtime() + when->cyt_interval;
  482 
  483         pcpu->profc_expected = when->cyt_when;
  484         pcpu->profc_interval = when->cyt_interval;
  485 }
  486 
  487 /*ARGSUSED*/
  488 static void
  489 profile_offline(void *arg, cpu_t *cpu, void *oarg)
  490 {
  491         profile_probe_percpu_t *pcpu = oarg;
  492 
  493         ASSERT(pcpu->profc_probe == arg);
  494         kmem_free(pcpu, sizeof (profile_probe_percpu_t));
  495 }
  496 
  497 /* ARGSUSED */
  498 static void
  499 profile_enable(void *arg, dtrace_id_t id, void *parg)
  500 {
  501         profile_probe_t *prof = parg;
  502         cyc_omni_handler_t omni;
  503         cyc_handler_t hdlr;
  504         cyc_time_t when;
  505 
  506         ASSERT(prof->prof_interval != 0);
  507         ASSERT(MUTEX_HELD(&cpu_lock));
  508 
  509         if (prof->prof_kind == PROF_TICK) {
  510                 hdlr.cyh_func = profile_tick;
  511                 hdlr.cyh_arg = prof;
  512 
  513                 when.cyt_interval = prof->prof_interval;
  514                 when.cyt_when = gethrtime() + when.cyt_interval;
  515         } else {
  516                 ASSERT(prof->prof_kind == PROF_PROFILE);
  517                 omni.cyo_online = profile_online;
  518                 omni.cyo_offline = profile_offline;
  519                 omni.cyo_arg = prof;
  520         }
  521 
  522         if (prof->prof_kind == PROF_TICK) {
  523                 prof->prof_cyclic = cyclic_add(&hdlr, &when);
  524         } else {
  525                 prof->prof_cyclic = cyclic_add_omni(&omni);
  526         }
  527 }
  528 
  529 /* ARGSUSED */
  530 static void
  531 profile_disable(void *arg, dtrace_id_t id, void *parg)
  532 {
  533         profile_probe_t *prof = parg;
  534 
  535         ASSERT(prof->prof_cyclic != CYCLIC_NONE);
  536         ASSERT(MUTEX_HELD(&cpu_lock));
  537 
  538         cyclic_remove(prof->prof_cyclic);
  539         prof->prof_cyclic = CYCLIC_NONE;
  540 }
  541 
  542 #else
  543 
  544 static void
  545 profile_enable_omni(profile_probe_t *prof)
  546 {
  547         profile_probe_percpu_t *pcpu;
  548         int cpu;
  549 
  550         prof->prof_pcpus = kmem_zalloc((mp_maxid + 1) * sizeof(pcpu), KM_SLEEP);
  551         CPU_FOREACH(cpu) {
  552                 pcpu = kmem_zalloc(sizeof(profile_probe_percpu_t), KM_SLEEP);
  553                 prof->prof_pcpus[cpu] = pcpu;
  554                 pcpu->profc_probe = prof;
  555                 pcpu->profc_expected = sbinuptime() + prof->prof_interval;
  556                 pcpu->profc_interval = prof->prof_interval;
  557                 callout_init(&pcpu->profc_cyclic, 1);
  558                 callout_reset_sbt_on(&pcpu->profc_cyclic,
  559                     pcpu->profc_expected, 0, profile_fire, pcpu,
  560                     cpu, C_DIRECT_EXEC | C_ABSOLUTE);
  561         }
  562 }
  563 
  564 static void
  565 profile_disable_omni(profile_probe_t *prof)
  566 {
  567         profile_probe_percpu_t *pcpu;
  568         int cpu;
  569 
  570         ASSERT(prof->prof_pcpus != NULL);
  571         CPU_FOREACH(cpu) {
  572                 pcpu = prof->prof_pcpus[cpu];
  573                 ASSERT(pcpu->profc_probe == prof);
  574                 ASSERT(callout_active(&pcpu->profc_cyclic));
  575                 callout_stop(&pcpu->profc_cyclic);
  576                 callout_drain(&pcpu->profc_cyclic);
  577                 kmem_free(pcpu, sizeof(profile_probe_percpu_t));
  578         }
  579         kmem_free(prof->prof_pcpus, (mp_maxid + 1) * sizeof(pcpu));
  580         prof->prof_pcpus = NULL;
  581 }
  582 
  583 /* ARGSUSED */
  584 static void
  585 profile_enable(void *arg, dtrace_id_t id, void *parg)
  586 {
  587         profile_probe_t *prof = parg;
  588 
  589         if (prof->prof_kind == PROF_TICK) {
  590                 prof->prof_expected = sbinuptime() + prof->prof_interval;
  591                 callout_reset_sbt(&prof->prof_cyclic,
  592                     prof->prof_expected, 0, profile_tick, prof,
  593                     C_DIRECT_EXEC | C_ABSOLUTE);
  594         } else {
  595                 ASSERT(prof->prof_kind == PROF_PROFILE);
  596                 profile_enable_omni(prof);
  597         }
  598 }
  599 
  600 /* ARGSUSED */
  601 static void
  602 profile_disable(void *arg, dtrace_id_t id, void *parg)
  603 {
  604         profile_probe_t *prof = parg;
  605 
  606         if (prof->prof_kind == PROF_TICK) {
  607                 ASSERT(callout_active(&prof->prof_cyclic));
  608                 callout_stop(&prof->prof_cyclic);
  609                 callout_drain(&prof->prof_cyclic);
  610         } else {
  611                 ASSERT(prof->prof_kind == PROF_PROFILE);
  612                 profile_disable_omni(prof);
  613         }
  614 }
  615 #endif
  616 
  617 static void
  618 profile_load(void *dummy)
  619 {
  620         if (dtrace_register("profile", &profile_attr, DTRACE_PRIV_USER,
  621             NULL, &profile_pops, NULL, &profile_id) != 0)
  622                 return;
  623 }
  624 
  625 
  626 static int
  627 profile_unload(void)
  628 {
  629         int error = 0;
  630 
  631         if ((error = dtrace_unregister(profile_id)) != 0)
  632                 return (error);
  633 
  634         return (error);
  635 }
  636 
  637 /* ARGSUSED */
  638 static int
  639 profile_modevent(module_t mod __unused, int type, void *data __unused)
  640 {
  641         int error = 0;
  642 
  643         switch (type) {
  644         case MOD_LOAD:
  645                 break;
  646 
  647         case MOD_UNLOAD:
  648                 break;
  649 
  650         case MOD_SHUTDOWN:
  651                 break;
  652 
  653         default:
  654                 error = EOPNOTSUPP;
  655                 break;
  656 
  657         }
  658         return (error);
  659 }
  660 
  661 SYSINIT(profile_load, SI_SUB_DTRACE_PROVIDER, SI_ORDER_ANY, profile_load, NULL);
  662 SYSUNINIT(profile_unload, SI_SUB_DTRACE_PROVIDER, SI_ORDER_ANY, profile_unload, NULL);
  663 
  664 DEV_MODULE(profile, profile_modevent, NULL);
  665 MODULE_VERSION(profile, 1);
  666 MODULE_DEPEND(profile, dtrace, 1, 1, 1);
  667 MODULE_DEPEND(profile, opensolaris, 1, 1, 1);
Cache object: 0aa268cd6be6bd42cdb906f8ded54d6e
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FreeBSD/Linux Kernel Cross Reference sys/cddl/dev/profile/profile.c

FreeBSD/Linux Kernel Cross Reference
sys/cddl/dev/profile/profile.c
