xnu-4903.270.47.tar.gz

[apple/xnu.git] / bsd / kern / kern_sysctl.c

/*
 * Copyright (c) 2000-2011 Apple Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 *
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 *
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 *
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */
/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
/*-
 * Copyright (c) 1982, 1986, 1989, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Mike Karels at Berkeley Software Design, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *      @(#)kern_sysctl.c       8.4 (Berkeley) 4/14/94
 */
/*
 * NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce
 * support for mandatory and extensible security protections.  This notice
 * is included in support of clause 2.2 (b) of the Apple Public License,
 * Version 2.0.
 */

/*
 * DEPRECATED sysctl system call code
 *
 * Everything in this file is deprecated. Sysctls should be handled
 * by the code in kern_newsysctl.c.
 * The remaining "case" sections are supposed to be converted into
 * SYSCTL_*-style definitions, and as soon as all of them are gone,
 * this source file is supposed to die.
 *
 * DO NOT ADD ANY MORE "case" SECTIONS TO THIS FILE, instead define
 * your sysctl with SYSCTL_INT, SYSCTL_PROC etc. in your source file.
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/proc_internal.h>
#include <sys/kauth.h>
#include <sys/file_internal.h>
#include <sys/vnode_internal.h>
#include <sys/unistd.h>
#include <sys/buf.h>
#include <sys/ioctl.h>
#include <sys/namei.h>
#include <sys/tty.h>
#include <sys/disklabel.h>
#include <sys/vm.h>
#include <sys/sysctl.h>
#include <sys/user.h>
#include <sys/aio_kern.h>
#include <sys/reboot.h>
#include <sys/memory_maintenance.h>
#include <sys/priv.h>
#include <stdatomic.h>

#include <security/audit/audit.h>
#include <kern/kalloc.h>

#include <machine/smp.h>
#include <machine/atomic.h>
#include <mach/machine.h>
#include <mach/mach_host.h>
#include <mach/mach_types.h>
#include <mach/processor_info.h>
#include <mach/vm_param.h>
#include <kern/debug.h>
#include <kern/mach_param.h>
#include <kern/task.h>
#include <kern/thread.h>
#include <kern/thread_group.h>
#include <kern/processor.h>
#include <kern/cpu_number.h>
#include <kern/cpu_quiesce.h>
#include <kern/sched_prim.h>
#include <vm/vm_kern.h>
#include <vm/vm_map.h>
#include <mach/host_info.h>

#include <sys/mount_internal.h>
#include <sys/kdebug.h>

#include <IOKit/IOPlatformExpert.h>
#include <pexpert/pexpert.h>

#include <machine/machine_routines.h>
#include <machine/exec.h>

#include <vm/vm_protos.h>
#include <vm/vm_pageout.h>
#include <vm/vm_compressor_algorithms.h>
#include <sys/imgsrc.h>
#include <kern/timer_call.h>

#if defined(__i386__) || defined(__x86_64__)
#include <i386/cpuid.h>
#endif

#if CONFIG_FREEZE
#include <sys/kern_memorystatus.h>
#endif

#if KPERF
#include <kperf/kperf.h>
#endif

#if HYPERVISOR
#include <kern/hv_support.h>
#endif

/*
 * deliberately setting max requests to really high number
 * so that runaway settings do not cause MALLOC overflows
 */
#define AIO_MAX_REQUESTS (128 * CONFIG_AIO_MAX)

extern int aio_max_requests;
extern int aio_max_requests_per_process;
extern int aio_worker_threads;
extern int lowpri_IO_window_msecs;
extern int lowpri_IO_delay_msecs;
#if DEVELOPMENT || DEBUG
extern int nx_enabled;
#endif
extern int speculative_reads_disabled;
extern unsigned int speculative_prefetch_max;
extern unsigned int speculative_prefetch_max_iosize;
extern unsigned int preheat_max_bytes;
extern unsigned int preheat_min_bytes;
extern long numvnodes;
extern long num_recycledvnodes;

extern uuid_string_t bootsessionuuid_string;

extern unsigned int vm_max_delayed_work_limit;
extern unsigned int vm_max_batch;

extern unsigned int vm_page_free_min;
extern unsigned int vm_page_free_target;
extern unsigned int vm_page_free_reserved;

#if (DEVELOPMENT || DEBUG)
extern uint32_t vm_page_creation_throttled_hard;
extern uint32_t vm_page_creation_throttled_soft;
#endif /* DEVELOPMENT || DEBUG */

/*
 * Conditionally allow dtrace to see these functions for debugging purposes.
 */
#ifdef STATIC
#undef STATIC
#endif
#if 0
#define STATIC
#else
#define STATIC static
#endif

extern boolean_t    mach_timer_coalescing_enabled;

extern uint64_t timer_deadline_tracking_bin_1, timer_deadline_tracking_bin_2;

STATIC void
fill_user32_eproc(proc_t, struct user32_eproc *__restrict);
STATIC void
fill_user32_externproc(proc_t, struct user32_extern_proc *__restrict);
STATIC void
fill_user64_eproc(proc_t, struct user64_eproc *__restrict);
STATIC void
fill_user64_proc(proc_t, struct user64_kinfo_proc *__restrict);
STATIC void
fill_user64_externproc(proc_t, struct user64_extern_proc *__restrict);
STATIC void
fill_user32_proc(proc_t, struct user32_kinfo_proc *__restrict);

extern int
kdbg_control(int *name, u_int namelen, user_addr_t where, size_t * sizep);
#if NFSCLIENT
extern int
netboot_root(void);
#endif
int
pcsamples_ops(int *name, u_int namelen, user_addr_t where, size_t *sizep,
    proc_t p);
int
sysctl_procargs(int *name, u_int namelen, user_addr_t where,
    size_t *sizep, proc_t cur_proc);
STATIC int
sysctl_procargsx(int *name, u_int namelen, user_addr_t where, size_t *sizep,
    proc_t cur_proc, int argc_yes);
int
sysctl_struct(user_addr_t oldp, size_t *oldlenp, user_addr_t newp,
    size_t newlen, void *sp, int len);

STATIC int sysdoproc_filt_KERN_PROC_PID(proc_t p, void * arg);
STATIC int sysdoproc_filt_KERN_PROC_PGRP(proc_t p, void * arg);
STATIC int sysdoproc_filt_KERN_PROC_TTY(proc_t p, void * arg);
STATIC int  sysdoproc_filt_KERN_PROC_UID(proc_t p, void * arg);
STATIC int  sysdoproc_filt_KERN_PROC_RUID(proc_t p, void * arg);
int sysdoproc_callback(proc_t p, void *arg);


/* forward declarations for non-static STATIC */
STATIC void fill_loadavg64(struct loadavg *la, struct user64_loadavg *la64);
STATIC void fill_loadavg32(struct loadavg *la, struct user32_loadavg *la32);
STATIC int sysctl_handle_kern_threadname(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_sched_stats(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_sched_stats_enable(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_kdebug_ops SYSCTL_HANDLER_ARGS;
#if COUNT_SYSCALLS
STATIC int sysctl_docountsyscalls SYSCTL_HANDLER_ARGS;
#endif  /* COUNT_SYSCALLS */
#if !CONFIG_EMBEDDED
STATIC int sysctl_doprocargs SYSCTL_HANDLER_ARGS;
#endif  /* !CONFIG_EMBEDDED */
STATIC int sysctl_doprocargs2 SYSCTL_HANDLER_ARGS;
STATIC int sysctl_prochandle SYSCTL_HANDLER_ARGS;
STATIC int sysctl_aiomax(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_aioprocmax(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_aiothreads(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_maxproc(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_osversion(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_sysctl_bootargs(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_maxvnodes(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_securelvl(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_domainname(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_hostname(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_procname(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_boottime(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_symfile(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
#if NFSCLIENT
STATIC int sysctl_netboot(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
#endif
#ifdef CONFIG_IMGSRC_ACCESS
STATIC int sysctl_imgsrcdev(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
#endif
STATIC int sysctl_usrstack(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_usrstack64(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
#if CONFIG_COREDUMP
STATIC int sysctl_coredump(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_suid_coredump(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
#endif
STATIC int sysctl_delayterm(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_rage_vnode(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_kern_check_openevt(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
#if DEVELOPMENT || DEBUG
STATIC int sysctl_nx(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
#endif
STATIC int sysctl_loadavg(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_vm_toggle_address_reuse(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_swapusage(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int fetch_process_cputype( proc_t cur_proc, int *name, u_int namelen, cpu_type_t *cputype);
STATIC int sysctl_sysctl_native(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_sysctl_cputype(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_safeboot(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_singleuser(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_minimalboot(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_slide(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);

#ifdef CONFIG_XNUPOST
#include <tests/xnupost.h>

STATIC int sysctl_debug_test_oslog_ctl(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_debug_test_stackshot_mutex_owner(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_debug_test_stackshot_rwlck_owner(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
#endif

extern void IORegistrySetOSBuildVersion(char * build_version);

STATIC void
fill_loadavg64(struct loadavg *la, struct user64_loadavg *la64)
{
        la64->ldavg[0]  = la->ldavg[0];
        la64->ldavg[1]  = la->ldavg[1];
        la64->ldavg[2]  = la->ldavg[2];
        la64->fscale    = (user64_long_t)la->fscale;
}

STATIC void
fill_loadavg32(struct loadavg *la, struct user32_loadavg *la32)
{
        la32->ldavg[0]  = la->ldavg[0];
        la32->ldavg[1]  = la->ldavg[1];
        la32->ldavg[2]  = la->ldavg[2];
        la32->fscale    = (user32_long_t)la->fscale;
}

#if CONFIG_COREDUMP
/*
 * Attributes stored in the kernel.
 */
extern char corefilename[MAXPATHLEN + 1];
extern int do_coredump;
extern int sugid_coredump;
#endif

#if COUNT_SYSCALLS
extern int do_count_syscalls;
#endif

#ifdef INSECURE
int securelevel = -1;
#else
int securelevel;
#endif

STATIC int
sysctl_handle_kern_threadname(  __unused struct sysctl_oid *oidp, __unused void *arg1,
    __unused int arg2, struct sysctl_req *req)
{
        int error;
        struct uthread *ut = get_bsdthread_info(current_thread());
        user_addr_t oldp = 0, newp = 0;
        size_t *oldlenp = NULL;
        size_t newlen = 0;

        oldp = req->oldptr;
        oldlenp = &(req->oldlen);
        newp = req->newptr;
        newlen = req->newlen;

        /* We want the current length, and maybe the string itself */
        if (oldlenp) {
                /* if we have no thread name yet tell'em we want MAXTHREADNAMESIZE - 1 */
                size_t currlen = MAXTHREADNAMESIZE - 1;

                if (ut->pth_name) {
                        /* use length of current thread name */
                        currlen = strlen(ut->pth_name);
                }
                if (oldp) {
                        if (*oldlenp < currlen) {
                                return ENOMEM;
                        }
                        /* NOTE - we do not copy the NULL terminator */
                        if (ut->pth_name) {
                                error = copyout(ut->pth_name, oldp, currlen);
                                if (error) {
                                        return error;
                                }
                        }
                }
                /* return length of thread name minus NULL terminator (just like strlen)  */
                req->oldidx = currlen;
        }

        /* We want to set the name to something */
        if (newp) {
                if (newlen > (MAXTHREADNAMESIZE - 1)) {
                        return ENAMETOOLONG;
                }
                if (!ut->pth_name) {
                        ut->pth_name = (char*)kalloc( MAXTHREADNAMESIZE );
                        if (!ut->pth_name) {
                                return ENOMEM;
                        }
                } else {
                        kernel_debug_string_simple(TRACE_STRING_THREADNAME_PREV, ut->pth_name);
                }
                bzero(ut->pth_name, MAXTHREADNAMESIZE);
                error = copyin(newp, ut->pth_name, newlen);
                if (error) {
                        return error;
                }

                kernel_debug_string_simple(TRACE_STRING_THREADNAME, ut->pth_name);
        }

        return 0;
}

SYSCTL_PROC(_kern, KERN_THREADNAME, threadname, CTLFLAG_ANYBODY | CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_LOCKED, 0, 0, sysctl_handle_kern_threadname, "A", "");

#define BSD_HOST 1
STATIC int
sysctl_sched_stats(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
        host_basic_info_data_t hinfo;
        kern_return_t kret;
        uint32_t size;
        int changed;
        mach_msg_type_number_t count = HOST_BASIC_INFO_COUNT;
        struct _processor_statistics_np *buf;
        int error;

        kret = host_info((host_t)BSD_HOST, HOST_BASIC_INFO, (host_info_t)&hinfo, &count);
        if (kret != KERN_SUCCESS) {
                return EINVAL;
        }

        size = sizeof(struct _processor_statistics_np) * (hinfo.logical_cpu_max + 2); /* One for RT Queue, One for Fair Share Queue */

        if (req->oldlen < size) {
                return EINVAL;
        }

        MALLOC(buf, struct _processor_statistics_np*, size, M_TEMP, M_ZERO | M_WAITOK);

        kret = get_sched_statistics(buf, &size);
        if (kret != KERN_SUCCESS) {
                error = EINVAL;
                goto out;
        }

        error = sysctl_io_opaque(req, buf, size, &changed);
        if (error) {
                goto out;
        }

        if (changed) {
                panic("Sched info changed?!");
        }
out:
        FREE(buf, M_TEMP);
        return error;
}

SYSCTL_PROC(_kern, OID_AUTO, sched_stats, CTLFLAG_LOCKED, 0, 0, sysctl_sched_stats, "-", "");

STATIC int
sysctl_sched_stats_enable(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, __unused struct sysctl_req *req)
{
        boolean_t active;
        int res;

        if (req->newlen != sizeof(active)) {
                return EINVAL;
        }

        res = copyin(req->newptr, &active, sizeof(active));
        if (res != 0) {
                return res;
        }

        return set_sched_stats_active(active);
}

SYSCTL_PROC(_kern, OID_AUTO, sched_stats_enable, CTLFLAG_LOCKED | CTLFLAG_WR, 0, 0, sysctl_sched_stats_enable, "-", "");

extern uint32_t sched_debug_flags;
SYSCTL_INT(_debug, OID_AUTO, sched, CTLFLAG_RW | CTLFLAG_LOCKED, &sched_debug_flags, 0, "scheduler debug");

#if (DEBUG || DEVELOPMENT)
extern boolean_t doprnt_hide_pointers;
SYSCTL_INT(_debug, OID_AUTO, hide_kernel_pointers, CTLFLAG_RW | CTLFLAG_LOCKED, &doprnt_hide_pointers, 0, "hide kernel pointers from log");
#endif

extern int get_kernel_symfile(proc_t, char **);

#if COUNT_SYSCALLS
#define KERN_COUNT_SYSCALLS (KERN_OSTYPE + 1000)

extern unsigned int     nsysent;
extern int syscalls_log[];
extern const char *syscallnames[];

STATIC int
sysctl_docountsyscalls SYSCTL_HANDLER_ARGS
{
        __unused int cmd = oidp->oid_arg2;      /* subcommand*/
        __unused int *name = arg1;      /* oid element argument vector */
        __unused int namelen = arg2;    /* number of oid element arguments */
        user_addr_t oldp = req->oldptr; /* user buffer copy out address */
        size_t *oldlenp = &req->oldlen; /* user buffer copy out size */
        user_addr_t newp = req->newptr; /* user buffer copy in address */
        size_t newlen = req->newlen;    /* user buffer copy in size */
        int error;

        int tmp;

        /* valid values passed in:
         * = 0 means don't keep called counts for each bsd syscall
         * > 0 means keep called counts for each bsd syscall
         * = 2 means dump current counts to the system log
         * = 3 means reset all counts
         * for example, to dump current counts:
         *              sysctl -w kern.count_calls=2
         */
        error = sysctl_int(oldp, oldlenp, newp, newlen, &tmp);
        if (error != 0) {
                return error;
        }

        if (tmp == 1) {
                do_count_syscalls = 1;
        } else if (tmp == 0 || tmp == 2 || tmp == 3) {
                int                     i;
                for (i = 0; i < nsysent; i++) {
                        if (syscalls_log[i] != 0) {
                                if (tmp == 2) {
                                        printf("%d calls - name %s \n", syscalls_log[i], syscallnames[i]);
                                } else {
                                        syscalls_log[i] = 0;
                                }
                        }
                }
                if (tmp != 0) {
                        do_count_syscalls = 1;
                }
        }

        /* adjust index so we return the right required/consumed amount */
        if (!error) {
                req->oldidx += req->oldlen;
        }

        return error;
}
SYSCTL_PROC(_kern, KERN_COUNT_SYSCALLS, count_syscalls, CTLTYPE_NODE | CTLFLAG_RD | CTLFLAG_LOCKED,
    0,                          /* Pointer argument (arg1) */
    0,                          /* Integer argument (arg2) */
    sysctl_docountsyscalls,     /* Handler function */
    NULL,                       /* Data pointer */
    "");
#endif  /* COUNT_SYSCALLS */

/*
 * The following sysctl_* functions should not be used
 * any more, as they can only cope with callers in
 * user mode: Use new-style
 *  sysctl_io_number()
 *  sysctl_io_string()
 *  sysctl_io_opaque()
 * instead.
 */

/*
 * Validate parameters and get old / set new parameters
 * for an integer-valued sysctl function.
 */
int
sysctl_int(user_addr_t oldp, size_t *oldlenp,
    user_addr_t newp, size_t newlen, int *valp)
{
        int error = 0;

        if (oldp != USER_ADDR_NULL && oldlenp == NULL) {
                return EFAULT;
        }
        if (oldp && *oldlenp < sizeof(int)) {
                return ENOMEM;
        }
        if (newp && newlen != sizeof(int)) {
                return EINVAL;
        }
        *oldlenp = sizeof(int);
        if (oldp) {
                error = copyout(valp, oldp, sizeof(int));
        }
        if (error == 0 && newp) {
                error = copyin(newp, valp, sizeof(int));
                AUDIT_ARG(value32, *valp);
        }
        return error;
}

/*
 * Validate parameters and get old / set new parameters
 * for an quad(64bit)-valued sysctl function.
 */
int
sysctl_quad(user_addr_t oldp, size_t *oldlenp,
    user_addr_t newp, size_t newlen, quad_t *valp)
{
        int error = 0;

        if (oldp != USER_ADDR_NULL && oldlenp == NULL) {
                return EFAULT;
        }
        if (oldp && *oldlenp < sizeof(quad_t)) {
                return ENOMEM;
        }
        if (newp && newlen != sizeof(quad_t)) {
                return EINVAL;
        }
        *oldlenp = sizeof(quad_t);
        if (oldp) {
                error = copyout(valp, oldp, sizeof(quad_t));
        }
        if (error == 0 && newp) {
                error = copyin(newp, valp, sizeof(quad_t));
        }
        return error;
}

STATIC int
sysdoproc_filt_KERN_PROC_PID(proc_t p, void * arg)
{
        if (p->p_pid != (pid_t)*(int*)arg) {
                return 0;
        } else {
                return 1;
        }
}

STATIC int
sysdoproc_filt_KERN_PROC_PGRP(proc_t p, void * arg)
{
        if (p->p_pgrpid != (pid_t)*(int*)arg) {
                return 0;
        } else {
                return 1;
        }
}

STATIC int
sysdoproc_filt_KERN_PROC_TTY(proc_t p, void * arg)
{
        int retval;
        struct tty *tp;

        /* This is very racy but list lock is held.. Hmmm. */
        if ((p->p_flag & P_CONTROLT) == 0 ||
            (p->p_pgrp == NULL) || (p->p_pgrp->pg_session == NULL) ||
            (tp = SESSION_TP(p->p_pgrp->pg_session)) == TTY_NULL ||
            tp->t_dev != (dev_t)*(int*)arg) {
                retval = 0;
        } else {
                retval = 1;
        }

        return retval;
}

STATIC int
sysdoproc_filt_KERN_PROC_UID(proc_t p, void * arg)
{
        kauth_cred_t my_cred;
        uid_t uid;

        if (p->p_ucred == NULL) {
                return 0;
        }
        my_cred = kauth_cred_proc_ref(p);
        uid = kauth_cred_getuid(my_cred);
        kauth_cred_unref(&my_cred);

        if (uid != (uid_t)*(int*)arg) {
                return 0;
        } else {
                return 1;
        }
}


STATIC int
sysdoproc_filt_KERN_PROC_RUID(proc_t p, void * arg)
{
        kauth_cred_t my_cred;
        uid_t ruid;

        if (p->p_ucred == NULL) {
                return 0;
        }
        my_cred = kauth_cred_proc_ref(p);
        ruid = kauth_cred_getruid(my_cred);
        kauth_cred_unref(&my_cred);

        if (ruid != (uid_t)*(int*)arg) {
                return 0;
        } else {
                return 1;
        }
}

/*
 * try over estimating by 5 procs
 */
#define KERN_PROCSLOP   (5 * sizeof (struct kinfo_proc))
struct sysdoproc_args {
        int     buflen;
        void    *kprocp;
        boolean_t is_64_bit;
        user_addr_t     dp;
        size_t needed;
        int sizeof_kproc;
        int *errorp;
        int uidcheck;
        int ruidcheck;
        int ttycheck;
        int uidval;
};

int
sysdoproc_callback(proc_t p, void *arg)
{
        struct sysdoproc_args *args = arg;

        if (args->buflen >= args->sizeof_kproc) {
                if ((args->ruidcheck != 0) && (sysdoproc_filt_KERN_PROC_RUID(p, &args->uidval) == 0)) {
                        return PROC_RETURNED;
                }
                if ((args->uidcheck != 0) && (sysdoproc_filt_KERN_PROC_UID(p, &args->uidval) == 0)) {
                        return PROC_RETURNED;
                }
                if ((args->ttycheck != 0) && (sysdoproc_filt_KERN_PROC_TTY(p, &args->uidval) == 0)) {
                        return PROC_RETURNED;
                }

                bzero(args->kprocp, args->sizeof_kproc);
                if (args->is_64_bit) {
                        fill_user64_proc(p, args->kprocp);
                } else {
                        fill_user32_proc(p, args->kprocp);
                }
                int error = copyout(args->kprocp, args->dp, args->sizeof_kproc);
                if (error) {
                        *args->errorp = error;
                        return PROC_RETURNED_DONE;
                }
                args->dp += args->sizeof_kproc;
                args->buflen -= args->sizeof_kproc;
        }
        args->needed += args->sizeof_kproc;
        return PROC_RETURNED;
}

SYSCTL_NODE(_kern, KERN_PROC, proc, CTLFLAG_RD | CTLFLAG_LOCKED, 0, "");
STATIC int
sysctl_prochandle SYSCTL_HANDLER_ARGS
{
        int cmd = oidp->oid_arg2;       /* subcommand for multiple nodes */
        int *name = arg1;               /* oid element argument vector */
        int namelen = arg2;             /* number of oid element arguments */
        user_addr_t where = req->oldptr;/* user buffer copy out address */

        user_addr_t dp = where;
        size_t needed = 0;
        int buflen = where != USER_ADDR_NULL ? req->oldlen : 0;
        int error = 0;
        boolean_t is_64_bit = proc_is64bit(current_proc());
        struct user32_kinfo_proc  user32_kproc;
        struct user64_kinfo_proc  user_kproc;
        int sizeof_kproc;
        void *kprocp;
        int (*filterfn)(proc_t, void *) = 0;
        struct sysdoproc_args args;
        int uidcheck = 0;
        int ruidcheck = 0;
        int ttycheck = 0;
        int success = 0;

        if (namelen != 1 && !(namelen == 0 && cmd == KERN_PROC_ALL)) {
                return EINVAL;
        }

        if (is_64_bit) {
                sizeof_kproc = sizeof(user_kproc);
                kprocp = &user_kproc;
        } else {
                sizeof_kproc = sizeof(user32_kproc);
                kprocp = &user32_kproc;
        }

        switch (cmd) {
        case KERN_PROC_PID:
                filterfn = sysdoproc_filt_KERN_PROC_PID;
                break;

        case KERN_PROC_PGRP:
                filterfn = sysdoproc_filt_KERN_PROC_PGRP;
                break;

        case KERN_PROC_TTY:
                ttycheck = 1;
                break;

        case KERN_PROC_UID:
                uidcheck = 1;
                break;

        case KERN_PROC_RUID:
                ruidcheck = 1;
                break;

        case KERN_PROC_ALL:
                break;

        default:
                /* must be kern.proc.<unknown> */
                return ENOTSUP;
        }

        error = 0;
        args.buflen = buflen;
        args.kprocp = kprocp;
        args.is_64_bit = is_64_bit;
        args.dp = dp;
        args.needed = needed;
        args.errorp = &error;
        args.uidcheck = uidcheck;
        args.ruidcheck = ruidcheck;
        args.ttycheck = ttycheck;
        args.sizeof_kproc = sizeof_kproc;
        if (namelen) {
                args.uidval = name[0];
        }

        success = proc_iterate((PROC_ALLPROCLIST | PROC_ZOMBPROCLIST),
            sysdoproc_callback, &args, filterfn, name);

        /*
         * rdar://problem/28433391: if we can't iterate over the processes,
         * make sure to return an error.
         */

        if (success != 0) {
                return ENOMEM;
        }

        if (error) {
                return error;
        }

        dp = args.dp;
        needed = args.needed;

        if (where != USER_ADDR_NULL) {
                req->oldlen = dp - where;
                if (needed > req->oldlen) {
                        return ENOMEM;
                }
        } else {
                needed += KERN_PROCSLOP;
                req->oldlen = needed;
        }
        /* adjust index so we return the right required/consumed amount */
        req->oldidx += req->oldlen;
        return 0;
}

/*
 * We specify the subcommand code for multiple nodes as the 'req->arg2' value
 * in the sysctl declaration itself, which comes into the handler function
 * as 'oidp->oid_arg2'.
 *
 * For these particular sysctls, since they have well known OIDs, we could
 * have just obtained it from the '((int *)arg1)[0]' parameter, but that would
 * not demonstrate how to handle multiple sysctls that used OID_AUTO instead
 * of a well known value with a common handler function.  This is desirable,
 * because we want well known values to "go away" at some future date.
 *
 * It should be noted that the value of '((int *)arg1)[1]' is used for many
 * an integer parameter to the subcommand for many of these sysctls; we'd
 * rather have used '((int *)arg1)[0]' for that, or even better, an element
 * in a structure passed in as the the 'newp' argument to sysctlbyname(3),
 * and then use leaf-node permissions enforcement, but that would have
 * necessitated modifying user space code to correspond to the interface
 * change, and we are striving for binary backward compatibility here; even
 * though these are SPI, and not intended for use by user space applications
 * which are not themselves system tools or libraries, some applications
 * have erroneously used them.
 */
SYSCTL_PROC(_kern_proc, KERN_PROC_ALL, all, CTLTYPE_NODE | CTLFLAG_RD | CTLFLAG_LOCKED,
    0,                          /* Pointer argument (arg1) */
    KERN_PROC_ALL,              /* Integer argument (arg2) */
    sysctl_prochandle,          /* Handler function */
    NULL,                       /* Data is size variant on ILP32/LP64 */
    "");
SYSCTL_PROC(_kern_proc, KERN_PROC_PID, pid, CTLTYPE_NODE | CTLFLAG_RD | CTLFLAG_LOCKED,
    0,                          /* Pointer argument (arg1) */
    KERN_PROC_PID,              /* Integer argument (arg2) */
    sysctl_prochandle,          /* Handler function */
    NULL,                       /* Data is size variant on ILP32/LP64 */
    "");
SYSCTL_PROC(_kern_proc, KERN_PROC_TTY, tty, CTLTYPE_NODE | CTLFLAG_RD | CTLFLAG_LOCKED,
    0,                          /* Pointer argument (arg1) */
    KERN_PROC_TTY,              /* Integer argument (arg2) */
    sysctl_prochandle,          /* Handler function */
    NULL,                       /* Data is size variant on ILP32/LP64 */
    "");
SYSCTL_PROC(_kern_proc, KERN_PROC_PGRP, pgrp, CTLTYPE_NODE | CTLFLAG_RD | CTLFLAG_LOCKED,
    0,                          /* Pointer argument (arg1) */
    KERN_PROC_PGRP,             /* Integer argument (arg2) */
    sysctl_prochandle,          /* Handler function */
    NULL,                       /* Data is size variant on ILP32/LP64 */
    "");
SYSCTL_PROC(_kern_proc, KERN_PROC_UID, uid, CTLTYPE_NODE | CTLFLAG_RD | CTLFLAG_LOCKED,
    0,                          /* Pointer argument (arg1) */
    KERN_PROC_UID,              /* Integer argument (arg2) */
    sysctl_prochandle,          /* Handler function */
    NULL,                       /* Data is size variant on ILP32/LP64 */
    "");
SYSCTL_PROC(_kern_proc, KERN_PROC_RUID, ruid, CTLTYPE_NODE | CTLFLAG_RD | CTLFLAG_LOCKED,
    0,                          /* Pointer argument (arg1) */
    KERN_PROC_RUID,             /* Integer argument (arg2) */
    sysctl_prochandle,          /* Handler function */
    NULL,                       /* Data is size variant on ILP32/LP64 */
    "");
SYSCTL_PROC(_kern_proc, KERN_PROC_LCID, lcid, CTLTYPE_NODE | CTLFLAG_RD | CTLFLAG_LOCKED,
    0,                          /* Pointer argument (arg1) */
    KERN_PROC_LCID,             /* Integer argument (arg2) */
    sysctl_prochandle,          /* Handler function */
    NULL,                       /* Data is size variant on ILP32/LP64 */
    "");


/*
 * Fill in non-zero fields of an eproc structure for the specified process.
 */
STATIC void
fill_user32_eproc(proc_t p, struct user32_eproc *__restrict ep)
{
        struct tty *tp;
        struct pgrp *pg;
        struct session *sessp;
        kauth_cred_t my_cred;

        pg = proc_pgrp(p);
        sessp = proc_session(p);

        if (pg != PGRP_NULL) {
                ep->e_pgid = p->p_pgrpid;
                ep->e_jobc = pg->pg_jobc;
                if (sessp != SESSION_NULL && sessp->s_ttyvp) {
                        ep->e_flag = EPROC_CTTY;
                }
        }
        ep->e_ppid = p->p_ppid;
        if (p->p_ucred) {
                my_cred = kauth_cred_proc_ref(p);

                /* A fake historical pcred */
                ep->e_pcred.p_ruid = kauth_cred_getruid(my_cred);
                ep->e_pcred.p_svuid = kauth_cred_getsvuid(my_cred);
                ep->e_pcred.p_rgid = kauth_cred_getrgid(my_cred);
                ep->e_pcred.p_svgid = kauth_cred_getsvgid(my_cred);

                /* A fake historical *kauth_cred_t */
                ep->e_ucred.cr_ref = os_atomic_load(&my_cred->cr_ref, relaxed);
                ep->e_ucred.cr_uid = kauth_cred_getuid(my_cred);
                ep->e_ucred.cr_ngroups = posix_cred_get(my_cred)->cr_ngroups;
                bcopy(posix_cred_get(my_cred)->cr_groups,
                    ep->e_ucred.cr_groups, NGROUPS * sizeof(gid_t));

                kauth_cred_unref(&my_cred);
        }

        if ((p->p_flag & P_CONTROLT) && (sessp != SESSION_NULL) &&
            (tp = SESSION_TP(sessp))) {
                ep->e_tdev = tp->t_dev;
                ep->e_tpgid = sessp->s_ttypgrpid;
        } else {
                ep->e_tdev = NODEV;
        }

        if (sessp != SESSION_NULL) {
                if (SESS_LEADER(p, sessp)) {
                        ep->e_flag |= EPROC_SLEADER;
                }
                session_rele(sessp);
        }
        if (pg != PGRP_NULL) {
                pg_rele(pg);
        }
}

/*
 * Fill in non-zero fields of an LP64 eproc structure for the specified process.
 */
STATIC void
fill_user64_eproc(proc_t p, struct user64_eproc *__restrict ep)
{
        struct tty *tp;
        struct pgrp *pg;
        struct session *sessp;
        kauth_cred_t my_cred;

        pg = proc_pgrp(p);
        sessp = proc_session(p);

        if (pg != PGRP_NULL) {
                ep->e_pgid = p->p_pgrpid;
                ep->e_jobc = pg->pg_jobc;
                if (sessp != SESSION_NULL && sessp->s_ttyvp) {
                        ep->e_flag = EPROC_CTTY;
                }
        }
        ep->e_ppid = p->p_ppid;
        if (p->p_ucred) {
                my_cred = kauth_cred_proc_ref(p);

                /* A fake historical pcred */
                ep->e_pcred.p_ruid = kauth_cred_getruid(my_cred);
                ep->e_pcred.p_svuid = kauth_cred_getsvuid(my_cred);
                ep->e_pcred.p_rgid = kauth_cred_getrgid(my_cred);
                ep->e_pcred.p_svgid = kauth_cred_getsvgid(my_cred);

                /* A fake historical *kauth_cred_t */
                ep->e_ucred.cr_ref = os_atomic_load(&my_cred->cr_ref, relaxed);
                ep->e_ucred.cr_uid = kauth_cred_getuid(my_cred);
                ep->e_ucred.cr_ngroups = posix_cred_get(my_cred)->cr_ngroups;
                bcopy(posix_cred_get(my_cred)->cr_groups,
                    ep->e_ucred.cr_groups, NGROUPS * sizeof(gid_t));

                kauth_cred_unref(&my_cred);
        }

        if ((p->p_flag & P_CONTROLT) && (sessp != SESSION_NULL) &&
            (tp = SESSION_TP(sessp))) {
                ep->e_tdev = tp->t_dev;
                ep->e_tpgid = sessp->s_ttypgrpid;
        } else {
                ep->e_tdev = NODEV;
        }

        if (sessp != SESSION_NULL) {
                if (SESS_LEADER(p, sessp)) {
                        ep->e_flag |= EPROC_SLEADER;
                }
                session_rele(sessp);
        }
        if (pg != PGRP_NULL) {
                pg_rele(pg);
        }
}

/*
 * Fill in an eproc structure for the specified process.
 * bzeroed by our caller, so only set non-zero fields.
 */
STATIC void
fill_user32_externproc(proc_t p, struct user32_extern_proc *__restrict exp)
{
        exp->p_starttime.tv_sec = p->p_start.tv_sec;
        exp->p_starttime.tv_usec = p->p_start.tv_usec;
        exp->p_flag = p->p_flag;
        if (p->p_lflag & P_LTRACED) {
                exp->p_flag |= P_TRACED;
        }
        if (p->p_lflag & P_LPPWAIT) {
                exp->p_flag |= P_PPWAIT;
        }
        if (p->p_lflag & P_LEXIT) {
                exp->p_flag |= P_WEXIT;
        }
        exp->p_stat = p->p_stat;
        exp->p_pid = p->p_pid;
        exp->p_oppid = p->p_oppid;
        /* Mach related  */
        exp->user_stack = p->user_stack;
        exp->p_debugger = p->p_debugger;
        exp->sigwait = p->sigwait;
        /* scheduling */
#ifdef _PROC_HAS_SCHEDINFO_
        exp->p_estcpu = p->p_estcpu;
        exp->p_pctcpu = p->p_pctcpu;
        exp->p_slptime = p->p_slptime;
#endif
        exp->p_realtimer.it_interval.tv_sec =
            (user32_time_t)p->p_realtimer.it_interval.tv_sec;
        exp->p_realtimer.it_interval.tv_usec =
            (__int32_t)p->p_realtimer.it_interval.tv_usec;

        exp->p_realtimer.it_value.tv_sec =
            (user32_time_t)p->p_realtimer.it_value.tv_sec;
        exp->p_realtimer.it_value.tv_usec =
            (__int32_t)p->p_realtimer.it_value.tv_usec;

        exp->p_rtime.tv_sec = (user32_time_t)p->p_rtime.tv_sec;
        exp->p_rtime.tv_usec = (__int32_t)p->p_rtime.tv_usec;

        exp->p_sigignore = p->p_sigignore;
        exp->p_sigcatch = p->p_sigcatch;
        exp->p_priority = p->p_priority;
        exp->p_nice = p->p_nice;
        bcopy(&p->p_comm, &exp->p_comm, MAXCOMLEN);
        exp->p_xstat = p->p_xstat;
        exp->p_acflag = p->p_acflag;
}

/*
 * Fill in an LP64 version of extern_proc structure for the specified process.
 */
STATIC void
fill_user64_externproc(proc_t p, struct user64_extern_proc *__restrict exp)
{
        exp->p_starttime.tv_sec = p->p_start.tv_sec;
        exp->p_starttime.tv_usec = p->p_start.tv_usec;
        exp->p_flag = p->p_flag;
        if (p->p_lflag & P_LTRACED) {
                exp->p_flag |= P_TRACED;
        }
        if (p->p_lflag & P_LPPWAIT) {
                exp->p_flag |= P_PPWAIT;
        }
        if (p->p_lflag & P_LEXIT) {
                exp->p_flag |= P_WEXIT;
        }
        exp->p_stat = p->p_stat;
        exp->p_pid = p->p_pid;
        exp->p_oppid = p->p_oppid;
        /* Mach related  */
        exp->user_stack = p->user_stack;
        exp->p_debugger = p->p_debugger;
        exp->sigwait = p->sigwait;
        /* scheduling */
#ifdef _PROC_HAS_SCHEDINFO_
        exp->p_estcpu = p->p_estcpu;
        exp->p_pctcpu = p->p_pctcpu;
        exp->p_slptime = p->p_slptime;
#endif
        exp->p_realtimer.it_interval.tv_sec = p->p_realtimer.it_interval.tv_sec;
        exp->p_realtimer.it_interval.tv_usec = p->p_realtimer.it_interval.tv_usec;

        exp->p_realtimer.it_value.tv_sec = p->p_realtimer.it_value.tv_sec;
        exp->p_realtimer.it_value.tv_usec = p->p_realtimer.it_value.tv_usec;

        exp->p_rtime.tv_sec = p->p_rtime.tv_sec;
        exp->p_rtime.tv_usec = p->p_rtime.tv_usec;

        exp->p_sigignore = p->p_sigignore;
        exp->p_sigcatch = p->p_sigcatch;
        exp->p_priority = p->p_priority;
        exp->p_nice = p->p_nice;
        bcopy(&p->p_comm, &exp->p_comm, MAXCOMLEN);
        exp->p_xstat = p->p_xstat;
        exp->p_acflag = p->p_acflag;
}

STATIC void
fill_user32_proc(proc_t p, struct user32_kinfo_proc *__restrict kp)
{
        /* on a 64 bit kernel, 32 bit users get some truncated information */
        fill_user32_externproc(p, &kp->kp_proc);
        fill_user32_eproc(p, &kp->kp_eproc);
}

STATIC void
fill_user64_proc(proc_t p, struct user64_kinfo_proc *__restrict kp)
{
        fill_user64_externproc(p, &kp->kp_proc);
        fill_user64_eproc(p, &kp->kp_eproc);
}

STATIC int
sysctl_kdebug_ops SYSCTL_HANDLER_ARGS
{
        __unused int cmd = oidp->oid_arg2;      /* subcommand*/
        int *name = arg1;               /* oid element argument vector */
        int namelen = arg2;             /* number of oid element arguments */
        user_addr_t oldp = req->oldptr; /* user buffer copy out address */
        size_t *oldlenp = &req->oldlen; /* user buffer copy out size */
//      user_addr_t newp = req->newptr; /* user buffer copy in address */
//      size_t newlen = req->newlen;    /* user buffer copy in size */

        int ret = 0;

        if (namelen == 0) {
                return ENOTSUP;
        }

        switch (name[0]) {
        case KERN_KDEFLAGS:
        case KERN_KDDFLAGS:
        case KERN_KDENABLE:
        case KERN_KDGETBUF:
        case KERN_KDSETUP:
        case KERN_KDREMOVE:
        case KERN_KDSETREG:
        case KERN_KDGETREG:
        case KERN_KDREADTR:
        case KERN_KDWRITETR:
        case KERN_KDWRITEMAP:
        case KERN_KDTEST:
        case KERN_KDPIDTR:
        case KERN_KDTHRMAP:
        case KERN_KDPIDEX:
        case KERN_KDSETBUF:
        case KERN_KDREADCURTHRMAP:
        case KERN_KDSET_TYPEFILTER:
        case KERN_KDBUFWAIT:
        case KERN_KDCPUMAP:
        case KERN_KDWRITEMAP_V3:
        case KERN_KDWRITETR_V3:
                ret = kdbg_control(name, namelen, oldp, oldlenp);
                break;
        default:
                ret = ENOTSUP;
                break;
        }

        /* adjust index so we return the right required/consumed amount */
        if (!ret) {
                req->oldidx += req->oldlen;
        }

        return ret;
}
SYSCTL_PROC(_kern, KERN_KDEBUG, kdebug, CTLTYPE_NODE | CTLFLAG_RD | CTLFLAG_LOCKED,
    0,                          /* Pointer argument (arg1) */
    0,                          /* Integer argument (arg2) */
    sysctl_kdebug_ops,          /* Handler function */
    NULL,                       /* Data pointer */
    "");


#if !CONFIG_EMBEDDED
/*
 * Return the top *sizep bytes of the user stack, or the entire area of the
 * user stack down through the saved exec_path, whichever is smaller.
 */
STATIC int
sysctl_doprocargs SYSCTL_HANDLER_ARGS
{
        __unused int cmd = oidp->oid_arg2;      /* subcommand*/
        int *name = arg1;               /* oid element argument vector */
        int namelen = arg2;             /* number of oid element arguments */
        user_addr_t oldp = req->oldptr; /* user buffer copy out address */
        size_t *oldlenp = &req->oldlen; /* user buffer copy out size */
//      user_addr_t newp = req->newptr; /* user buffer copy in address */
//      size_t newlen = req->newlen;    /* user buffer copy in size */
        int error;

        error =  sysctl_procargsx( name, namelen, oldp, oldlenp, current_proc(), 0);

        /* adjust index so we return the right required/consumed amount */
        if (!error) {
                req->oldidx += req->oldlen;
        }

        return error;
}
SYSCTL_PROC(_kern, KERN_PROCARGS, procargs, CTLTYPE_NODE | CTLFLAG_RD | CTLFLAG_LOCKED,
    0,                          /* Pointer argument (arg1) */
    0,                          /* Integer argument (arg2) */
    sysctl_doprocargs,          /* Handler function */
    NULL,                       /* Data pointer */
    "");
#endif  /* !CONFIG_EMBEDDED */

STATIC int
sysctl_doprocargs2 SYSCTL_HANDLER_ARGS
{
        __unused int cmd = oidp->oid_arg2;      /* subcommand*/
        int *name = arg1;               /* oid element argument vector */
        int namelen = arg2;             /* number of oid element arguments */
        user_addr_t oldp = req->oldptr; /* user buffer copy out address */
        size_t *oldlenp = &req->oldlen; /* user buffer copy out size */
//      user_addr_t newp = req->newptr; /* user buffer copy in address */
//      size_t newlen = req->newlen;    /* user buffer copy in size */
        int error;

        error = sysctl_procargsx( name, namelen, oldp, oldlenp, current_proc(), 1);

        /* adjust index so we return the right required/consumed amount */
        if (!error) {
                req->oldidx += req->oldlen;
        }

        return error;
}
SYSCTL_PROC(_kern, KERN_PROCARGS2, procargs2, CTLTYPE_NODE | CTLFLAG_RD | CTLFLAG_LOCKED,
    0,                          /* Pointer argument (arg1) */
    0,                          /* Integer argument (arg2) */
    sysctl_doprocargs2,         /* Handler function */
    NULL,                       /* Data pointer */
    "");

STATIC int
sysctl_procargsx(int *name, u_int namelen, user_addr_t where,
    size_t *sizep, proc_t cur_proc, int argc_yes)
{
        proc_t p;
        int buflen = where != USER_ADDR_NULL ? *sizep : 0;
        int error = 0;
        struct _vm_map *proc_map;
        struct task * task;
        vm_map_copy_t   tmp;
        user_addr_t     arg_addr;
        size_t          arg_size;
        caddr_t data;
        size_t argslen = 0;
        int size;
        vm_size_t alloc_size = 0;
        vm_offset_t     copy_start, copy_end;
        kern_return_t ret;
        int pid;
        kauth_cred_t my_cred;
        uid_t uid;
        int argc = -1;

        if (namelen < 1) {
                return EINVAL;
        }

        if (argc_yes) {
                buflen -= sizeof(int);          /* reserve first word to return argc */
        }
        /* we only care about buflen when where (oldp from sysctl) is not NULL. */
        /* when where (oldp from sysctl) is NULL and sizep (oldlenp from sysctl */
        /* is not NULL then the caller wants us to return the length needed to */
        /* hold the data we would return */
        if (where != USER_ADDR_NULL && (buflen <= 0 || buflen > ARG_MAX)) {
                return EINVAL;
        }
        arg_size = buflen;

        /*
         *      Lookup process by pid
         */
        pid = name[0];
        p = proc_find(pid);
        if (p == NULL) {
                return EINVAL;
        }

        /*
         *      Copy the top N bytes of the stack.
         *      On all machines we have so far, the stack grows
         *      downwards.
         *
         *      If the user expects no more than N bytes of
         *      argument list, use that as a guess for the
         *      size.
         */

        if (!p->user_stack) {
                proc_rele(p);
                return EINVAL;
        }

        if (where == USER_ADDR_NULL) {
                /* caller only wants to know length of proc args data */
                if (sizep == NULL) {
                        proc_rele(p);
                        return EFAULT;
                }

                size = p->p_argslen;
                proc_rele(p);
                if (argc_yes) {
                        size += sizeof(int);
                } else {
                        /*
                         * old PROCARGS will return the executable's path and plus some
                         * extra space for work alignment and data tags
                         */
                        size += PATH_MAX + (6 * sizeof(int));
                }
                size += (size & (sizeof(int) - 1)) ? (sizeof(int) - (size & (sizeof(int) - 1))) : 0;
                *sizep = size;
                return 0;
        }

        my_cred = kauth_cred_proc_ref(p);
        uid = kauth_cred_getuid(my_cred);
        kauth_cred_unref(&my_cred);

        if ((uid != kauth_cred_getuid(kauth_cred_get()))
            && suser(kauth_cred_get(), &cur_proc->p_acflag)) {
                proc_rele(p);
                return EINVAL;
        }

        if ((u_int)arg_size > p->p_argslen) {
                arg_size = round_page(p->p_argslen);
        }

        arg_addr = p->user_stack - arg_size;

        /*
         *      Before we can block (any VM code), make another
         *      reference to the map to keep it alive.  We do
         *      that by getting a reference on the task itself.
         */
        task = p->task;
        if (task == NULL) {
                proc_rele(p);
                return EINVAL;
        }

        /* save off argc before releasing the proc */
        argc = p->p_argc;

        argslen = p->p_argslen;
        /*
         * Once we have a task reference we can convert that into a
         * map reference, which we will use in the calls below.  The
         * task/process may change its map after we take this reference
         * (see execve), but the worst that will happen then is a return
         * of stale info (which is always a possibility).
         */
        task_reference(task);
        proc_rele(p);
        proc_map = get_task_map_reference(task);
        task_deallocate(task);

        if (proc_map == NULL) {
                return EINVAL;
        }

        alloc_size = round_page(arg_size);
        ret = kmem_alloc(kernel_map, &copy_start, alloc_size, VM_KERN_MEMORY_BSD);
        if (ret != KERN_SUCCESS) {
                vm_map_deallocate(proc_map);
                return ENOMEM;
        }
        bzero((void *)copy_start, alloc_size);

        copy_end = round_page(copy_start + arg_size);

        if (vm_map_copyin(proc_map, (vm_map_address_t)arg_addr,
            (vm_map_size_t)arg_size, FALSE, &tmp) != KERN_SUCCESS) {
                vm_map_deallocate(proc_map);
                kmem_free(kernel_map, copy_start,
                    round_page(arg_size));
                return EIO;
        }

        /*
         *      Now that we've done the copyin from the process'
         *      map, we can release the reference to it.
         */
        vm_map_deallocate(proc_map);

        if (vm_map_copy_overwrite(kernel_map,
            (vm_map_address_t)copy_start,
            tmp, FALSE) != KERN_SUCCESS) {
                kmem_free(kernel_map, copy_start,
                    round_page(arg_size));
                vm_map_copy_discard(tmp);
                return EIO;
        }

        if (arg_size > argslen) {
                data = (caddr_t) (copy_end - argslen);
                size = argslen;
        } else {
                data = (caddr_t) (copy_end - arg_size);
                size = arg_size;
        }

        /*
         * When these sysctls were introduced, the first string in the strings
         * section was just the bare path of the executable.  However, for security
         * reasons we now prefix this string with executable_path= so it can be
         * parsed getenv style.  To avoid binary compatability issues with exising
         * callers of this sysctl, we strip it off here if present.
         * (rdar://problem/13746466)
         */
#define        EXECUTABLE_KEY "executable_path="
        if (strncmp(EXECUTABLE_KEY, data, strlen(EXECUTABLE_KEY)) == 0) {
                data += strlen(EXECUTABLE_KEY);
                size -= strlen(EXECUTABLE_KEY);
        }

        if (argc_yes) {
                /* Put processes argc as the first word in the copyout buffer */
                suword(where, argc);
                error = copyout(data, (where + sizeof(int)), size);
                size += sizeof(int);
        } else {
                error = copyout(data, where, size);

                /*
                 * Make the old PROCARGS work to return the executable's path
                 * But, only if there is enough space in the provided buffer
                 *
                 * on entry: data [possibily] points to the beginning of the path
                 *
                 * Note: we keep all pointers&sizes aligned to word boundries
                 */
                if ((!error) && (buflen > 0 && (u_int)buflen > argslen)) {
                        int binPath_sz, alignedBinPath_sz = 0;
                        int extraSpaceNeeded, addThis;
                        user_addr_t placeHere;
                        char * str = (char *) data;
                        int max_len = size;

                        /* Some apps are really bad about messing up their stacks
                         *  So, we have to be extra careful about getting the length
                         *  of the executing binary.  If we encounter an error, we bail.
                         */

                        /* Limit ourselves to PATH_MAX paths */
                        if (max_len > PATH_MAX) {
                                max_len = PATH_MAX;
                        }

                        binPath_sz = 0;

                        while ((binPath_sz < max_len - 1) && (*str++ != 0)) {
                                binPath_sz++;
                        }

                        /* If we have a NUL terminator, copy it, too */
                        if (binPath_sz < max_len - 1) {
                                binPath_sz += 1;
                        }

                        /* Pre-Flight the space requiremnts */

                        /* Account for the padding that fills out binPath to the next word */
                        alignedBinPath_sz += (binPath_sz & (sizeof(int) - 1)) ? (sizeof(int) - (binPath_sz & (sizeof(int) - 1))) : 0;

                        placeHere = where + size;

                        /* Account for the bytes needed to keep placeHere word aligned */
                        addThis = (placeHere & (sizeof(int) - 1)) ? (sizeof(int) - (placeHere & (sizeof(int) - 1))) : 0;

                        /* Add up all the space that is needed */
                        extraSpaceNeeded = alignedBinPath_sz + addThis + binPath_sz + (4 * sizeof(int));

                        /* is there is room to tack on argv[0]? */
                        if ((buflen & ~(sizeof(int) - 1)) >= (argslen + extraSpaceNeeded)) {
                                placeHere += addThis;
                                suword(placeHere, 0);
                                placeHere += sizeof(int);
                                suword(placeHere, 0xBFFF0000);
                                placeHere += sizeof(int);
                                suword(placeHere, 0);
                                placeHere += sizeof(int);
                                error = copyout(data, placeHere, binPath_sz);
                                if (!error) {
                                        placeHere += binPath_sz;
                                        suword(placeHere, 0);
                                        size += extraSpaceNeeded;
                                }
                        }
                }
        }

        if (copy_start != (vm_offset_t) 0) {
                kmem_free(kernel_map, copy_start, copy_end - copy_start);
        }
        if (error) {
                return error;
        }

        if (where != USER_ADDR_NULL) {
                *sizep = size;
        }
        return 0;
}


/*
 * Max number of concurrent aio requests
 */
STATIC int
sysctl_aiomax
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
        int new_value, changed;
        int error = sysctl_io_number(req, aio_max_requests, sizeof(int), &new_value, &changed);
        if (changed) {
                /* make sure the system-wide limit is greater than the per process limit */
                if (new_value >= aio_max_requests_per_process && new_value <= AIO_MAX_REQUESTS) {
                        aio_max_requests = new_value;
                } else {
                        error = EINVAL;
                }
        }
        return error;
}


/*
 * Max number of concurrent aio requests per process
 */
STATIC int
sysctl_aioprocmax
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
        int new_value, changed;
        int error = sysctl_io_number(req, aio_max_requests_per_process, sizeof(int), &new_value, &changed);
        if (changed) {
                /* make sure per process limit is less than the system-wide limit */
                if (new_value <= aio_max_requests && new_value >= AIO_LISTIO_MAX) {
                        aio_max_requests_per_process = new_value;
                } else {
                        error = EINVAL;
                }
        }
        return error;
}


/*
 * Max number of async IO worker threads
 */
STATIC int
sysctl_aiothreads
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
        int new_value, changed;
        int error = sysctl_io_number(req, aio_worker_threads, sizeof(int), &new_value, &changed);
        if (changed) {
                /* we only allow an increase in the number of worker threads */
                if (new_value > aio_worker_threads) {
                        _aio_create_worker_threads((new_value - aio_worker_threads));
                        aio_worker_threads = new_value;
                } else {
                        error = EINVAL;
                }
        }
        return error;
}


/*
 * System-wide limit on the max number of processes
 */
STATIC int
sysctl_maxproc
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
        int new_value, changed;
        int error = sysctl_io_number(req, maxproc, sizeof(int), &new_value, &changed);
        if (changed) {
                AUDIT_ARG(value32, new_value);
                /* make sure the system-wide limit is less than the configured hard
                 *  limit set at kernel compilation */
                if (new_value <= hard_maxproc && new_value > 0) {
                        maxproc = new_value;
                } else {
                        error = EINVAL;
                }
        }
        return error;
}

extern int sched_enable_smt;
STATIC int
sysctl_sched_enable_smt
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
        int new_value, changed;
        int error = sysctl_io_number(req, sched_enable_smt, sizeof(int), &new_value, &changed);
        if (error) {
                return error;
        }
        kern_return_t kret = KERN_SUCCESS;
        if (changed) {
                AUDIT_ARG(value32, new_value);
                if (new_value == 0) {
                        sched_enable_smt = 0;
                        kret = enable_smt_processors(false);
                } else {
                        sched_enable_smt = 1;
                        kret = enable_smt_processors(true);
                }
        }
        switch (kret) {
        case KERN_SUCCESS:
                error = 0;
                break;
        case KERN_INVALID_ARGUMENT:
                error = EINVAL;
                break;
        case KERN_FAILURE:
                error = EBUSY;
                break;
        default:
                error = ENOENT;
                break;
        }

        return error;
}

SYSCTL_STRING(_kern, KERN_OSTYPE, ostype,
    CTLFLAG_RD | CTLFLAG_KERN | CTLFLAG_LOCKED,
    ostype, 0, "");
SYSCTL_STRING(_kern, KERN_OSRELEASE, osrelease,
    CTLFLAG_RD | CTLFLAG_KERN | CTLFLAG_LOCKED,
    osrelease, 0, "");
SYSCTL_INT(_kern, KERN_OSREV, osrevision,
    CTLFLAG_RD | CTLFLAG_KERN | CTLFLAG_LOCKED,
    (int *)NULL, BSD, "");
SYSCTL_STRING(_kern, KERN_VERSION, version,
    CTLFLAG_RD | CTLFLAG_KERN | CTLFLAG_LOCKED,
    version, 0, "");
SYSCTL_STRING(_kern, OID_AUTO, uuid,
    CTLFLAG_RD | CTLFLAG_KERN | CTLFLAG_LOCKED,
    &kernel_uuid_string[0], 0, "");

SYSCTL_STRING(_kern, OID_AUTO, osbuildconfig,
    CTLFLAG_RD | CTLFLAG_KERN | CTLFLAG_LOCKED | CTLFLAG_MASKED,
    &osbuild_config[0], 0, "");


#if DEBUG
#ifndef DKPR
#define DKPR 1
#endif
#endif

#if DKPR
int debug_kprint_syscall = 0;
char debug_kprint_syscall_process[MAXCOMLEN + 1];

/* Thread safe: bits and string value are not used to reclaim state */
SYSCTL_INT(_debug, OID_AUTO, kprint_syscall,
    CTLFLAG_RW | CTLFLAG_LOCKED, &debug_kprint_syscall, 0, "kprintf syscall tracing");
SYSCTL_STRING(_debug, OID_AUTO, kprint_syscall_process,
    CTLFLAG_RW | CTLFLAG_LOCKED, debug_kprint_syscall_process, sizeof(debug_kprint_syscall_process),
    "name of process for kprintf syscall tracing");

int
debug_kprint_current_process(const char **namep)
{
        struct proc *p = current_proc();

        if (p == NULL) {
                return 0;
        }

        if (debug_kprint_syscall_process[0]) {
                /* user asked to scope tracing to a particular process name */
                if (0 == strncmp(debug_kprint_syscall_process,
                    p->p_comm, sizeof(debug_kprint_syscall_process))) {
                        /* no value in telling the user that we traced what they asked */
                        if (namep) {
                                *namep = NULL;
                        }

                        return 1;
                } else {
                        return 0;
                }
        }

        /* trace all processes. Tell user what we traced */
        if (namep) {
                *namep = p->p_comm;
        }

        return 1;
}
#endif

/* PR-5293665: need to use a callback function for kern.osversion to set
 * osversion in IORegistry */

STATIC int
sysctl_osversion(__unused struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req)
{
        int rval = 0;

        rval = sysctl_handle_string(oidp, arg1, arg2, req);

        if (req->newptr) {
                IORegistrySetOSBuildVersion((char *)arg1);
        }

        return rval;
}

SYSCTL_PROC(_kern, KERN_OSVERSION, osversion,
    CTLFLAG_RW | CTLFLAG_KERN | CTLTYPE_STRING | CTLFLAG_LOCKED,
    osversion, 256 /* OSVERSIZE*/,
    sysctl_osversion, "A", "");

char osproductversion[48] = { '\0' };

STATIC int
sysctl_osproductversion(__unused struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req)
{
        if (req->newptr != 0) {
                /*
                 * Can only ever be set by launchd, and only once at boot.
                 */
                if (req->p->p_pid != 1 || osproductversion[0] != '\0') {
                        return EPERM;
                }
        }

        return sysctl_handle_string(oidp, arg1, arg2, req);
}

SYSCTL_PROC(_kern, OID_AUTO, osproductversion,
    CTLFLAG_RW | CTLFLAG_KERN | CTLTYPE_STRING | CTLFLAG_LOCKED,
    osproductversion, sizeof(osproductversion),
    sysctl_osproductversion, "A", "The ProductVersion from SystemVersion.plist");

static uint64_t osvariant_status = 0;

STATIC int
sysctl_osvariant_status(__unused struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req)
{
        if (req->newptr != 0) {
                /*
                 * Can only ever be set by launchd, and only once at boot.
                 */
                if (req->p->p_pid != 1 || osvariant_status != 0) {
                        return EPERM;
                }
        }

        return sysctl_handle_quad(oidp, arg1, arg2, req);
}

SYSCTL_PROC(_kern, OID_AUTO, osvariant_status,
    CTLFLAG_RW | CTLTYPE_QUAD | CTLFLAG_LOCKED | CTLFLAG_MASKED,
    &osvariant_status, sizeof(osvariant_status),
    sysctl_osvariant_status, "Q", "Opaque flags used to cache OS variant information");

#if defined(XNU_TARGET_OS_BRIDGE)
char macosproductversion[MACOS_VERS_LEN] = { '\0' };

SYSCTL_STRING(_kern, OID_AUTO, macosproductversion,
    CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_LOCKED,
    &macosproductversion[0], MACOS_VERS_LEN, "The currently running macOS ProductVersion (from SystemVersion.plist on macOS)");

char macosversion[MACOS_VERS_LEN] = { '\0' };

SYSCTL_STRING(_kern, OID_AUTO, macosversion,
    CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_LOCKED,
    &macosversion[0], MACOS_VERS_LEN, "The currently running macOS build version");
#endif

STATIC int
sysctl_sysctl_bootargs
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
        int error;
        /* BOOT_LINE_LENGTH */
#if CONFIG_EMBEDDED
        size_t boot_args_len = 256;
#else
        size_t boot_args_len = 1024;
#endif
        char buf[boot_args_len];

        strlcpy(buf, PE_boot_args(), boot_args_len);
        error = sysctl_io_string(req, buf, boot_args_len, 0, NULL);
        return error;
}

SYSCTL_PROC(_kern, OID_AUTO, bootargs,
    CTLFLAG_LOCKED | CTLFLAG_RD | CTLFLAG_KERN | CTLTYPE_STRING,
    NULL, 0,
    sysctl_sysctl_bootargs, "A", "bootargs");

STATIC int
sysctl_kernelcacheuuid(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req)
{
        int rval = ENOENT;
        if (kernelcache_uuid_valid) {
                rval = sysctl_handle_string(oidp, arg1, arg2, req);
        }
        return rval;
}

SYSCTL_PROC(_kern, OID_AUTO, kernelcacheuuid,
    CTLFLAG_RD | CTLFLAG_KERN | CTLTYPE_STRING | CTLFLAG_LOCKED,
    kernelcache_uuid_string, sizeof(kernelcache_uuid_string),
    sysctl_kernelcacheuuid, "A", "");

SYSCTL_INT(_kern, KERN_MAXFILES, maxfiles,
    CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_LOCKED,
    &maxfiles, 0, "");
SYSCTL_INT(_kern, KERN_ARGMAX, argmax,
    CTLFLAG_RD | CTLFLAG_KERN | CTLFLAG_LOCKED,
    (int *)NULL, ARG_MAX, "");
SYSCTL_INT(_kern, KERN_POSIX1, posix1version,
    CTLFLAG_RD | CTLFLAG_KERN | CTLFLAG_LOCKED,
    (int *)NULL, _POSIX_VERSION, "");
SYSCTL_INT(_kern, KERN_NGROUPS, ngroups,
    CTLFLAG_RD | CTLFLAG_KERN | CTLFLAG_LOCKED,
    (int *)NULL, NGROUPS_MAX, "");
SYSCTL_INT(_kern, KERN_JOB_CONTROL, job_control,
    CTLFLAG_RD | CTLFLAG_KERN | CTLFLAG_LOCKED,
    (int *)NULL, 1, "");
#if 1   /* _POSIX_SAVED_IDS from <unistd.h> */
SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids,
    CTLFLAG_RD | CTLFLAG_KERN | CTLFLAG_LOCKED,
    (int *)NULL, 1, "");
#else
SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids,
    CTLFLAG_RD | CTLFLAG_KERN | CTLFLAG_LOCKED,
    NULL, 0, "");
#endif
SYSCTL_INT(_kern, OID_AUTO, num_files,
    CTLFLAG_RD | CTLFLAG_LOCKED,
    &nfiles, 0, "");
SYSCTL_COMPAT_INT(_kern, OID_AUTO, num_vnodes,
    CTLFLAG_RD | CTLFLAG_LOCKED,
    &numvnodes, 0, "");
SYSCTL_INT(_kern, OID_AUTO, num_tasks,
    CTLFLAG_RD | CTLFLAG_LOCKED,
    &task_max, 0, "");
SYSCTL_INT(_kern, OID_AUTO, num_threads,
    CTLFLAG_RD | CTLFLAG_LOCKED,
    &thread_max, 0, "");
SYSCTL_INT(_kern, OID_AUTO, num_taskthreads,
    CTLFLAG_RD | CTLFLAG_LOCKED,
    &task_threadmax, 0, "");
SYSCTL_LONG(_kern, OID_AUTO, num_recycledvnodes,
    CTLFLAG_RD | CTLFLAG_LOCKED,
    &num_recycledvnodes, "");

STATIC int
sysctl_maxvnodes(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
        int oldval = desiredvnodes;
        int error = sysctl_io_number(req, desiredvnodes, sizeof(int), &desiredvnodes, NULL);

        if (oldval != desiredvnodes) {
                resize_namecache(desiredvnodes);
        }

        return error;
}

SYSCTL_INT(_kern, OID_AUTO, namecache_disabled,
    CTLFLAG_RW | CTLFLAG_LOCKED,
    &nc_disabled, 0, "");

SYSCTL_PROC(_kern, KERN_MAXVNODES, maxvnodes,
    CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED,
    0, 0, sysctl_maxvnodes, "I", "");

SYSCTL_PROC(_kern, KERN_MAXPROC, maxproc,
    CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED,
    0, 0, sysctl_maxproc, "I", "");

SYSCTL_PROC(_kern, KERN_AIOMAX, aiomax,
    CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED,
    0, 0, sysctl_aiomax, "I", "");

SYSCTL_PROC(_kern, KERN_AIOPROCMAX, aioprocmax,
    CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED,
    0, 0, sysctl_aioprocmax, "I", "");

SYSCTL_PROC(_kern, KERN_AIOTHREADS, aiothreads,
    CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED,
    0, 0, sysctl_aiothreads, "I", "");

SYSCTL_PROC(_kern, OID_AUTO, sched_enable_smt,
    CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_KERN,
    0, 0, sysctl_sched_enable_smt, "I", "");

extern int sched_allow_NO_SMT_threads;
SYSCTL_INT(_kern, OID_AUTO, sched_allow_NO_SMT_threads,
    CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &sched_allow_NO_SMT_threads, 0, "");

#if (DEVELOPMENT || DEBUG)
extern int sched_smt_balance;
SYSCTL_INT(_kern, OID_AUTO, sched_smt_balance,
    CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &sched_smt_balance, 0, "");
extern int sched_allow_rt_smt;
SYSCTL_INT(_kern, OID_AUTO, sched_allow_rt_smt,
    CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &sched_allow_rt_smt, 0, "");
extern int sched_avoid_cpu0;
SYSCTL_INT(_kern, OID_AUTO, sched_avoid_cpu0,
    CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &sched_avoid_cpu0, 0, "");
#if __arm__ || __arm64__
extern uint32_t perfcontrol_requested_recommended_cores;
SYSCTL_UINT(_kern, OID_AUTO, sched_recommended_cores,
    CTLFLAG_KERN | CTLFLAG_RD | CTLFLAG_LOCKED,
    &perfcontrol_requested_recommended_cores, 0, "");

/* Scheduler perfcontrol callouts sysctls */
SYSCTL_DECL(_kern_perfcontrol_callout);
SYSCTL_NODE(_kern, OID_AUTO, perfcontrol_callout, CTLFLAG_RW | CTLFLAG_LOCKED, 0,
    "scheduler perfcontrol callouts");

extern int perfcontrol_callout_stats_enabled;
SYSCTL_INT(_kern_perfcontrol_callout, OID_AUTO, stats_enabled,
    CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &perfcontrol_callout_stats_enabled, 0, "");

extern uint64_t perfcontrol_callout_stat_avg(perfcontrol_callout_type_t type,
    perfcontrol_callout_stat_t stat);

/* On-Core Callout */
STATIC int
sysctl_perfcontrol_callout_stat
(__unused struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req)
{
        perfcontrol_callout_stat_t stat = (perfcontrol_callout_stat_t)arg1;
        perfcontrol_callout_type_t type = (perfcontrol_callout_type_t)arg2;
        return sysctl_io_number(req, (int)perfcontrol_callout_stat_avg(type, stat),
                   sizeof(int), NULL, NULL);
}

SYSCTL_PROC(_kern_perfcontrol_callout, OID_AUTO, oncore_instr,
    CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_LOCKED,
    (void *)PERFCONTROL_STAT_INSTRS, PERFCONTROL_CALLOUT_ON_CORE,
    sysctl_perfcontrol_callout_stat, "I", "");
SYSCTL_PROC(_kern_perfcontrol_callout, OID_AUTO, oncore_cycles,
    CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_LOCKED,
    (void *)PERFCONTROL_STAT_CYCLES, PERFCONTROL_CALLOUT_ON_CORE,
    sysctl_perfcontrol_callout_stat, "I", "");
SYSCTL_PROC(_kern_perfcontrol_callout, OID_AUTO, offcore_instr,
    CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_LOCKED,
    (void *)PERFCONTROL_STAT_INSTRS, PERFCONTROL_CALLOUT_OFF_CORE,
    sysctl_perfcontrol_callout_stat, "I", "");
SYSCTL_PROC(_kern_perfcontrol_callout, OID_AUTO, offcore_cycles,
    CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_LOCKED,
    (void *)PERFCONTROL_STAT_CYCLES, PERFCONTROL_CALLOUT_OFF_CORE,
    sysctl_perfcontrol_callout_stat, "I", "");
SYSCTL_PROC(_kern_perfcontrol_callout, OID_AUTO, context_instr,
    CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_LOCKED,
    (void *)PERFCONTROL_STAT_INSTRS, PERFCONTROL_CALLOUT_CONTEXT,
    sysctl_perfcontrol_callout_stat, "I", "");
SYSCTL_PROC(_kern_perfcontrol_callout, OID_AUTO, context_cycles,
    CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_LOCKED,
    (void *)PERFCONTROL_STAT_CYCLES, PERFCONTROL_CALLOUT_CONTEXT,
    sysctl_perfcontrol_callout_stat, "I", "");
SYSCTL_PROC(_kern_perfcontrol_callout, OID_AUTO, update_instr,
    CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_LOCKED,
    (void *)PERFCONTROL_STAT_INSTRS, PERFCONTROL_CALLOUT_STATE_UPDATE,
    sysctl_perfcontrol_callout_stat, "I", "");
SYSCTL_PROC(_kern_perfcontrol_callout, OID_AUTO, update_cycles,
    CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_LOCKED,
    (void *)PERFCONTROL_STAT_CYCLES, PERFCONTROL_CALLOUT_STATE_UPDATE,
    sysctl_perfcontrol_callout_stat, "I", "");

#endif /* __arm__ || __arm64__ */
#endif /* (DEVELOPMENT || DEBUG) */

STATIC int
sysctl_securelvl
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
        int new_value, changed;
        int error = sysctl_io_number(req, securelevel, sizeof(int), &new_value, &changed);
        if (changed) {
                if (!(new_value < securelevel && req->p->p_pid != 1)) {
                        proc_list_lock();
                        securelevel = new_value;
                        proc_list_unlock();
                } else {
                        error = EPERM;
                }
        }
        return error;
}

SYSCTL_PROC(_kern, KERN_SECURELVL, securelevel,
    CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED,
    0, 0, sysctl_securelvl, "I", "");


STATIC int
sysctl_domainname
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
        int error, changed;
        error = sysctl_io_string(req, domainname, sizeof(domainname), 0, &changed);
        if (changed) {
                domainnamelen = strlen(domainname);
        }
        return error;
}

SYSCTL_PROC(_kern, KERN_DOMAINNAME, nisdomainname,
    CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_LOCKED,
    0, 0, sysctl_domainname, "A", "");

SYSCTL_COMPAT_INT(_kern, KERN_HOSTID, hostid,
    CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_LOCKED,
    &hostid, 0, "");

STATIC int
sysctl_hostname
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
        int error, changed;
        error = sysctl_io_string(req, hostname, sizeof(hostname), 1, &changed);
        if (changed) {
                hostnamelen = req->newlen;
        }
        return error;
}


SYSCTL_PROC(_kern, KERN_HOSTNAME, hostname,
    CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_LOCKED,
    0, 0, sysctl_hostname, "A", "");

STATIC int
sysctl_procname
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
        /* Original code allowed writing, I'm copying this, although this all makes
         *  no sense to me. Besides, this sysctl is never used. */
        return sysctl_io_string(req, &req->p->p_name[0], (2 * MAXCOMLEN + 1), 1, NULL);
}

SYSCTL_PROC(_kern, KERN_PROCNAME, procname,
    CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_ANYBODY | CTLFLAG_LOCKED,
    0, 0, sysctl_procname, "A", "");

SYSCTL_INT(_kern, KERN_SPECULATIVE_READS, speculative_reads_disabled,
    CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_LOCKED,
    &speculative_reads_disabled, 0, "");

SYSCTL_UINT(_kern, OID_AUTO, preheat_max_bytes,
    CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_LOCKED,
    &preheat_max_bytes, 0, "");

SYSCTL_UINT(_kern, OID_AUTO, preheat_min_bytes,
    CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_LOCKED,
    &preheat_min_bytes, 0, "");

SYSCTL_UINT(_kern, OID_AUTO, speculative_prefetch_max,
    CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_LOCKED,
    &speculative_prefetch_max, 0, "");

SYSCTL_UINT(_kern, OID_AUTO, speculative_prefetch_max_iosize,
    CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_LOCKED,
    &speculative_prefetch_max_iosize, 0, "");

SYSCTL_UINT(_kern, OID_AUTO, vm_page_free_target,
    CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_LOCKED,
    &vm_page_free_target, 0, "");

SYSCTL_UINT(_kern, OID_AUTO, vm_page_free_min,
    CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_LOCKED,
    &vm_page_free_min, 0, "");

SYSCTL_UINT(_kern, OID_AUTO, vm_page_free_reserved,
    CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_LOCKED,
    &vm_page_free_reserved, 0, "");

SYSCTL_UINT(_kern, OID_AUTO, vm_page_speculative_percentage,
    CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_LOCKED,
    &vm_pageout_state.vm_page_speculative_percentage, 0, "");

SYSCTL_UINT(_kern, OID_AUTO, vm_page_speculative_q_age_ms,
    CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_LOCKED,
    &vm_pageout_state.vm_page_speculative_q_age_ms, 0, "");

SYSCTL_UINT(_kern, OID_AUTO, vm_max_delayed_work_limit,
    CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_LOCKED,
    &vm_max_delayed_work_limit, 0, "");

SYSCTL_UINT(_kern, OID_AUTO, vm_max_batch,
    CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_LOCKED,
    &vm_max_batch, 0, "");

SYSCTL_STRING(_kern, OID_AUTO, bootsessionuuid,
    CTLFLAG_RD | CTLFLAG_LOCKED,
    &bootsessionuuid_string, sizeof(bootsessionuuid_string), "");

STATIC int
sysctl_boottime
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
        struct timeval tv;
        boottime_timeval(&tv);
        struct proc *p = req->p;

        if (proc_is64bit(p)) {
                struct user64_timeval t = {};
                t.tv_sec = tv.tv_sec;
                t.tv_usec = tv.tv_usec;
                return sysctl_io_opaque(req, &t, sizeof(t), NULL);
        } else {
                struct user32_timeval t = {};
                t.tv_sec = tv.tv_sec;
                t.tv_usec = tv.tv_usec;
                return sysctl_io_opaque(req, &t, sizeof(t), NULL);
        }
}

SYSCTL_PROC(_kern, KERN_BOOTTIME, boottime,
    CTLTYPE_STRUCT | CTLFLAG_KERN | CTLFLAG_RD | CTLFLAG_LOCKED,
    0, 0, sysctl_boottime, "S,timeval", "");

STATIC int
sysctl_symfile
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
        char *str;
        int error = get_kernel_symfile(req->p, &str);
        if (error) {
                return error;
        }
        return sysctl_io_string(req, str, 0, 0, NULL);
}


SYSCTL_PROC(_kern, KERN_SYMFILE, symfile,
    CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_LOCKED,
    0, 0, sysctl_symfile, "A", "");

#if NFSCLIENT
STATIC int
sysctl_netboot
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
        return sysctl_io_number(req, netboot_root(), sizeof(int), NULL, NULL);
}

SYSCTL_PROC(_kern, KERN_NETBOOT, netboot,
    CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_LOCKED,
    0, 0, sysctl_netboot, "I", "");
#endif

#ifdef CONFIG_IMGSRC_ACCESS
/*
 * Legacy--act as if only one layer of nesting is possible.
 */
STATIC int
sysctl_imgsrcdev
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
        vfs_context_t ctx = vfs_context_current();
        vnode_t devvp;
        int result;

        if (!vfs_context_issuser(ctx)) {
                return EPERM;
        }

        if (imgsrc_rootvnodes[0] == NULL) {
                return ENOENT;
        }

        result = vnode_getwithref(imgsrc_rootvnodes[0]);
        if (result != 0) {
                return result;
        }

        devvp = vnode_mount(imgsrc_rootvnodes[0])->mnt_devvp;
        result = vnode_getwithref(devvp);
        if (result != 0) {
                goto out;
        }

        result = sysctl_io_number(req, vnode_specrdev(devvp), sizeof(dev_t), NULL, NULL);

        vnode_put(devvp);
out:
        vnode_put(imgsrc_rootvnodes[0]);
        return result;
}

SYSCTL_PROC(_kern, OID_AUTO, imgsrcdev,
    CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_LOCKED,
    0, 0, sysctl_imgsrcdev, "I", "");

STATIC int
sysctl_imgsrcinfo
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
        int error;
        struct imgsrc_info info[MAX_IMAGEBOOT_NESTING] = {};    /* 2 for now, no problem */
        uint32_t i;
        vnode_t rvp, devvp;

        if (imgsrc_rootvnodes[0] == NULLVP) {
                return ENXIO;
        }

        for (i = 0; i < MAX_IMAGEBOOT_NESTING; i++) {
                /*
                 * Go get the root vnode.
                 */
                rvp = imgsrc_rootvnodes[i];
                if (rvp == NULLVP) {
                        break;
                }

                error = vnode_get(rvp);
                if (error != 0) {
                        return error;
                }

                /*
                 * For now, no getting at a non-local volume.
                 */
                devvp = vnode_mount(rvp)->mnt_devvp;
                if (devvp == NULL) {
                        vnode_put(rvp);
                        return EINVAL;
                }

                error = vnode_getwithref(devvp);
                if (error != 0) {
                        vnode_put(rvp);
                        return error;
                }

                /*
                 * Fill in info.
                 */
                info[i].ii_dev = vnode_specrdev(devvp);
                info[i].ii_flags = 0;
                info[i].ii_height = i;
                bzero(info[i].ii_reserved, sizeof(info[i].ii_reserved));

                vnode_put(devvp);
                vnode_put(rvp);
        }

        return sysctl_io_opaque(req, info, i * sizeof(info[0]), NULL);
}

SYSCTL_PROC(_kern, OID_AUTO, imgsrcinfo,
    CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_LOCKED,
    0, 0, sysctl_imgsrcinfo, "I", "");

#endif /* CONFIG_IMGSRC_ACCESS */


SYSCTL_DECL(_kern_timer);
SYSCTL_NODE(_kern, OID_AUTO, timer, CTLFLAG_RW | CTLFLAG_LOCKED, 0, "timer");


SYSCTL_INT(_kern_timer, OID_AUTO, coalescing_enabled,
    CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &mach_timer_coalescing_enabled, 0, "");

SYSCTL_QUAD(_kern_timer, OID_AUTO, deadline_tracking_bin_1,
    CTLFLAG_RW | CTLFLAG_LOCKED,
    &timer_deadline_tracking_bin_1, "");
SYSCTL_QUAD(_kern_timer, OID_AUTO, deadline_tracking_bin_2,
    CTLFLAG_RW | CTLFLAG_LOCKED,
    &timer_deadline_tracking_bin_2, "");

SYSCTL_DECL(_kern_timer_longterm);
SYSCTL_NODE(_kern_timer, OID_AUTO, longterm, CTLFLAG_RW | CTLFLAG_LOCKED, 0, "longterm");


/* Must match definition in osfmk/kern/timer_call.c */
enum {
        THRESHOLD, QCOUNT,
        ENQUEUES, DEQUEUES, ESCALATES, SCANS, PREEMPTS,
        LATENCY, LATENCY_MIN, LATENCY_MAX, SCAN_LIMIT, SCAN_INTERVAL, PAUSES
};
extern uint64_t timer_sysctl_get(int);
extern int      timer_sysctl_set(int, uint64_t);

STATIC int
sysctl_timer
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
        int             oid = (int)arg1;
        uint64_t        value = timer_sysctl_get(oid);
        uint64_t        new_value;
        int             error;
        int             changed;

        error = sysctl_io_number(req, value, sizeof(value), &new_value, &changed);
        if (changed) {
                error = timer_sysctl_set(oid, new_value);
        }

        return error;
}

SYSCTL_PROC(_kern_timer_longterm, OID_AUTO, threshold,
    CTLTYPE_QUAD | CTLFLAG_RW | CTLFLAG_LOCKED,
    (void *) THRESHOLD, 0, sysctl_timer, "Q", "");
SYSCTL_PROC(_kern_timer_longterm, OID_AUTO, scan_limit,
    CTLTYPE_QUAD | CTLFLAG_RW | CTLFLAG_LOCKED,
    (void *) SCAN_LIMIT, 0, sysctl_timer, "Q", "");
SYSCTL_PROC(_kern_timer_longterm, OID_AUTO, scan_interval,
    CTLTYPE_QUAD | CTLFLAG_RW | CTLFLAG_LOCKED,
    (void *) SCAN_INTERVAL, 0, sysctl_timer, "Q", "");

SYSCTL_PROC(_kern_timer_longterm, OID_AUTO, qlen,
    CTLTYPE_QUAD | CTLFLAG_RD | CTLFLAG_LOCKED,
    (void *) QCOUNT, 0, sysctl_timer, "Q", "");
SYSCTL_PROC(_kern_timer_longterm, OID_AUTO, scan_pauses,
    CTLTYPE_QUAD | CTLFLAG_RD | CTLFLAG_LOCKED,
    (void *) PAUSES, 0, sysctl_timer, "Q", "");

#if  DEBUG
SYSCTL_PROC(_kern_timer_longterm, OID_AUTO, enqueues,
    CTLTYPE_QUAD | CTLFLAG_RD | CTLFLAG_LOCKED,
    (void *) ENQUEUES, 0, sysctl_timer, "Q", "");
SYSCTL_PROC(_kern_timer_longterm, OID_AUTO, dequeues,
    CTLTYPE_QUAD | CTLFLAG_RD | CTLFLAG_LOCKED,
    (void *) DEQUEUES, 0, sysctl_timer, "Q", "");
SYSCTL_PROC(_kern_timer_longterm, OID_AUTO, escalates,
    CTLTYPE_QUAD | CTLFLAG_RD | CTLFLAG_LOCKED,
    (void *) ESCALATES, 0, sysctl_timer, "Q", "");
SYSCTL_PROC(_kern_timer_longterm, OID_AUTO, scans,
    CTLTYPE_QUAD | CTLFLAG_RD | CTLFLAG_LOCKED,
    (void *) SCANS, 0, sysctl_timer, "Q", "");
SYSCTL_PROC(_kern_timer_longterm, OID_AUTO, preempts,
    CTLTYPE_QUAD | CTLFLAG_RD | CTLFLAG_LOCKED,
    (void *) PREEMPTS, 0, sysctl_timer, "Q", "");
SYSCTL_PROC(_kern_timer_longterm, OID_AUTO, latency,
    CTLTYPE_QUAD | CTLFLAG_RD | CTLFLAG_LOCKED,
    (void *) LATENCY, 0, sysctl_timer, "Q", "");
SYSCTL_PROC(_kern_timer_longterm, OID_AUTO, latency_min,
    CTLTYPE_QUAD | CTLFLAG_RD | CTLFLAG_LOCKED,
    (void *) LATENCY_MIN, 0, sysctl_timer, "Q", "");
SYSCTL_PROC(_kern_timer_longterm, OID_AUTO, latency_max,
    CTLTYPE_QUAD | CTLFLAG_RD | CTLFLAG_LOCKED,
    (void *) LATENCY_MAX, 0, sysctl_timer, "Q", "");
#endif /* DEBUG */

STATIC int
sysctl_usrstack
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
        return sysctl_io_number(req, (int)req->p->user_stack, sizeof(int), NULL, NULL);
}

SYSCTL_PROC(_kern, KERN_USRSTACK32, usrstack,
    CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_LOCKED,
    0, 0, sysctl_usrstack, "I", "");

STATIC int
sysctl_usrstack64
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
        return sysctl_io_number(req, req->p->user_stack, sizeof(req->p->user_stack), NULL, NULL);
}

SYSCTL_PROC(_kern, KERN_USRSTACK64, usrstack64,
    CTLTYPE_QUAD | CTLFLAG_RD | CTLFLAG_LOCKED,
    0, 0, sysctl_usrstack64, "Q", "");

#if CONFIG_COREDUMP

SYSCTL_STRING(_kern, KERN_COREFILE, corefile,
    CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_LOCKED,
    corefilename, sizeof(corefilename), "");

STATIC int
sysctl_coredump
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
#ifdef SECURE_KERNEL
        (void)req;
        return ENOTSUP;
#else
        int new_value, changed;
        int error = sysctl_io_number(req, do_coredump, sizeof(int), &new_value, &changed);
        if (changed) {
                if ((new_value == 0) || (new_value == 1)) {
                        do_coredump = new_value;
                } else {
                        error = EINVAL;
                }
        }
        return error;
#endif
}

SYSCTL_PROC(_kern, KERN_COREDUMP, coredump,
    CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED,
    0, 0, sysctl_coredump, "I", "");

STATIC int
sysctl_suid_coredump
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
#ifdef SECURE_KERNEL
        (void)req;
        return ENOTSUP;
#else
        int new_value, changed;
        int error = sysctl_io_number(req, sugid_coredump, sizeof(int), &new_value, &changed);
        if (changed) {
                if ((new_value == 0) || (new_value == 1)) {
                        sugid_coredump = new_value;
                } else {
                        error = EINVAL;
                }
        }
        return error;
#endif
}

SYSCTL_PROC(_kern, KERN_SUGID_COREDUMP, sugid_coredump,
    CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED,
    0, 0, sysctl_suid_coredump, "I", "");

#endif /* CONFIG_COREDUMP */

STATIC int
sysctl_delayterm
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
        struct proc *p = req->p;
        int new_value, changed;
        int error = sysctl_io_number(req, (req->p->p_lflag & P_LDELAYTERM)? 1: 0, sizeof(int), &new_value, &changed);
        if (changed) {
                proc_lock(p);
                if (new_value) {
                        req->p->p_lflag |=  P_LDELAYTERM;
                } else {
                        req->p->p_lflag &=  ~P_LDELAYTERM;
                }
                proc_unlock(p);
        }
        return error;
}

SYSCTL_PROC(_kern, KERN_PROCDELAYTERM, delayterm,
    CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED,
    0, 0, sysctl_delayterm, "I", "");


STATIC int
sysctl_rage_vnode
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
        struct proc *p = req->p;
        struct  uthread *ut;
        int new_value, old_value, changed;
        int error;

        ut = get_bsdthread_info(current_thread());

        if (ut->uu_flag & UT_RAGE_VNODES) {
                old_value = KERN_RAGE_THREAD;
        } else if (p->p_lflag & P_LRAGE_VNODES) {
                old_value = KERN_RAGE_PROC;
        } else {
                old_value = 0;
        }

        error = sysctl_io_number(req, old_value, sizeof(int), &new_value, &changed);

        if (error == 0) {
                switch (new_value) {
                case KERN_RAGE_PROC:
                        proc_lock(p);
                        p->p_lflag |= P_LRAGE_VNODES;
                        proc_unlock(p);
                        break;
                case KERN_UNRAGE_PROC:
                        proc_lock(p);
                        p->p_lflag &= ~P_LRAGE_VNODES;
                        proc_unlock(p);
                        break;

                case KERN_RAGE_THREAD:
                        ut->uu_flag |= UT_RAGE_VNODES;
                        break;
                case KERN_UNRAGE_THREAD:
                        ut = get_bsdthread_info(current_thread());
                        ut->uu_flag &= ~UT_RAGE_VNODES;
                        break;
                }
        }
        return error;
}

SYSCTL_PROC(_kern, KERN_RAGEVNODE, rage_vnode,
    CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_ANYBODY | CTLFLAG_LOCKED,
    0, 0, sysctl_rage_vnode, "I", "");

/* XXX move this interface into libproc and remove this sysctl */
STATIC int
sysctl_setthread_cpupercent
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
        int new_value, old_value;
        int error = 0;
        kern_return_t kret = KERN_SUCCESS;
        uint8_t percent = 0;
        int ms_refill = 0;

        if (!req->newptr) {
                return 0;
        }

        old_value = 0;

        if ((error = sysctl_io_number(req, old_value, sizeof(old_value), &new_value, NULL)) != 0) {
                return error;
        }

        percent = new_value & 0xff;                     /* low 8 bytes for perent */
        ms_refill = (new_value >> 8) & 0xffffff;        /* upper 24bytes represent ms refill value */
        if (percent > 100) {
                return EINVAL;
        }

        /*
         * If the caller is specifying a percentage of 0, this will unset the CPU limit, if present.
         */
        if ((kret = thread_set_cpulimit(THREAD_CPULIMIT_BLOCK, percent, ms_refill * (int)NSEC_PER_MSEC)) != 0) {
                return EIO;
        }

        return 0;
}

SYSCTL_PROC(_kern, OID_AUTO, setthread_cpupercent,
    CTLTYPE_INT | CTLFLAG_WR | CTLFLAG_ANYBODY,
    0, 0, sysctl_setthread_cpupercent, "I", "set thread cpu percentage limit");


STATIC int
sysctl_kern_check_openevt
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
        struct proc *p = req->p;
        int new_value, old_value, changed;
        int error;

        if (p->p_flag & P_CHECKOPENEVT) {
                old_value = KERN_OPENEVT_PROC;
        } else {
                old_value = 0;
        }

        error = sysctl_io_number(req, old_value, sizeof(int), &new_value, &changed);

        if (error == 0) {
                switch (new_value) {
                case KERN_OPENEVT_PROC:
                        OSBitOrAtomic(P_CHECKOPENEVT, &p->p_flag);
                        break;

                case KERN_UNOPENEVT_PROC:
                        OSBitAndAtomic(~((uint32_t)P_CHECKOPENEVT), &p->p_flag);
                        break;

                default:
                        error = EINVAL;
                }
        }
        return error;
}

SYSCTL_PROC(_kern, KERN_CHECKOPENEVT, check_openevt, CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_ANYBODY | CTLFLAG_LOCKED,
    0, 0, sysctl_kern_check_openevt, "I", "set the per-process check-open-evt flag");


#if DEVELOPMENT || DEBUG
STATIC int
sysctl_nx
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
#ifdef SECURE_KERNEL
        (void)req;
        return ENOTSUP;
#else
        int new_value, changed;
        int error;

        error = sysctl_io_number(req, nx_enabled, sizeof(nx_enabled), &new_value, &changed);
        if (error) {
                return error;
        }

        if (changed) {
#if defined(__x86_64__)
                /*
                 * Only allow setting if NX is supported on the chip
                 */
                if (!(cpuid_extfeatures() & CPUID_EXTFEATURE_XD)) {
                        return ENOTSUP;
                }
#endif
                nx_enabled = new_value;
        }
        return error;
#endif /* SECURE_KERNEL */
}
#endif

#if DEVELOPMENT || DEBUG
SYSCTL_PROC(_kern, KERN_NX_PROTECTION, nx,
    CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_LOCKED,
    0, 0, sysctl_nx, "I", "");
#endif

STATIC int
sysctl_loadavg
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
        if (proc_is64bit(req->p)) {
                struct user64_loadavg loadinfo64 = {};
                fill_loadavg64(&averunnable, &loadinfo64);
                return sysctl_io_opaque(req, &loadinfo64, sizeof(loadinfo64), NULL);
        } else {
                struct user32_loadavg loadinfo32 = {};
                fill_loadavg32(&averunnable, &loadinfo32);
                return sysctl_io_opaque(req, &loadinfo32, sizeof(loadinfo32), NULL);
        }
}

SYSCTL_PROC(_vm, VM_LOADAVG, loadavg,
    CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_LOCKED,
    0, 0, sysctl_loadavg, "S,loadavg", "");

/*
 * Note:        Thread safe; vm_map_lock protects in  vm_toggle_entry_reuse()
 */
STATIC int
sysctl_vm_toggle_address_reuse(__unused struct sysctl_oid *oidp, __unused void *arg1,
    __unused int arg2, struct sysctl_req *req)
{
        int old_value = 0, new_value = 0, error = 0;

        if (vm_toggle_entry_reuse( VM_TOGGLE_GETVALUE, &old_value )) {
                return error;
        }
        error = sysctl_io_number(req, old_value, sizeof(int), &new_value, NULL);
        if (!error) {
                return vm_toggle_entry_reuse(new_value, NULL);
        }
        return error;
}

SYSCTL_PROC(_debug, OID_AUTO, toggle_address_reuse, CTLFLAG_ANYBODY | CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED, 0, 0, sysctl_vm_toggle_address_reuse, "I", "");

#ifdef CONFIG_XNUPOST

extern int xnupost_export_testdata(void *outp, uint32_t size, uint32_t *lenp);
extern uint32_t xnupost_get_estimated_testdata_size(void);

extern int xnupost_reset_all_tests(void);

STATIC int
sysctl_handle_xnupost_get_tests SYSCTL_HANDLER_ARGS
{
        /* fixup unused arguments warnings */
        __unused int _oa2                  = arg2;
        __unused void * _oa1               = arg1;
        __unused struct sysctl_oid * _oidp = oidp;

        int error          = 0;
        user_addr_t oldp   = 0;
        user_addr_t newp   = 0;
        uint32_t usedbytes = 0;

        oldp = req->oldptr;
        newp = req->newptr;

        if (newp) {
                return ENOTSUP;
        }

        if ((void *)oldp == NULL) {
                /* return estimated size for second call where info can be placed */
                req->oldidx = xnupost_get_estimated_testdata_size();
        } else {
                error       = xnupost_export_testdata((void *)oldp, req->oldlen, &usedbytes);
                req->oldidx = usedbytes;
        }

        return error;
}

SYSCTL_PROC(_debug,
    OID_AUTO,
    xnupost_get_tests,
    CTLFLAG_MASKED | CTLFLAG_ANYBODY | CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_LOCKED,
    0,
    0,
    sysctl_handle_xnupost_get_tests,
    "-",
    "read xnupost test data in kernel");

STATIC int
sysctl_debug_xnupost_ctl SYSCTL_HANDLER_ARGS
{
        /* fixup unused arguments warnings */
        __unused int _oa2                  = arg2;
        __unused void * _oa1               = arg1;
        __unused struct sysctl_oid * _oidp = oidp;

#define ARRCOUNT 4
        /*
         * INPUT: ACTION,  PARAM1, PARAM2, PARAM3
         * OUTPUT: RESULTCODE, ADDITIONAL DATA
         */
        int32_t outval[ARRCOUNT] = {0};
        int32_t input[ARRCOUNT]  = {0};
        int32_t out_size         = sizeof(outval);
        int32_t in_size          = sizeof(input);
        int error                = 0;

        /* if this is NULL call to find out size, send out size info */
        if (!req->newptr) {
                goto out;
        }

        /* pull in provided value from userspace */
        error = SYSCTL_IN(req, &input[0], in_size);
        if (error) {
                return error;
        }

        if (input[0] == XTCTL_RESET_TESTDATA) {
                outval[0] = xnupost_reset_all_tests();
                goto out;
        }

out:
        error = SYSCTL_OUT(req, &outval[0], out_size);
        return error;
}

SYSCTL_PROC(_debug,
    OID_AUTO,
    xnupost_testctl,
    CTLFLAG_MASKED | CTLFLAG_ANYBODY | CTLTYPE_OPAQUE | CTLFLAG_RW | CTLFLAG_LOCKED,
    0,
    0,
    sysctl_debug_xnupost_ctl,
    "I",
    "xnupost control for kernel testing");

extern void test_oslog_handleOSLogCtl(int32_t * in, int32_t * out, int32_t arraycount);

STATIC int
sysctl_debug_test_oslog_ctl(__unused struct sysctl_oid * oidp, __unused void * arg1, __unused int arg2, struct sysctl_req * req)
{
#define ARRCOUNT 4
        int32_t outval[ARRCOUNT] = {0};
        int32_t input[ARRCOUNT]  = {0};
        int32_t size_outval      = sizeof(outval);
        int32_t size_inval       = sizeof(input);
        int32_t error;

        /* if this is NULL call to find out size, send out size info */
        if (!req->newptr) {
                error = SYSCTL_OUT(req, &outval[0], size_outval);
                return error;
        }

        /* pull in provided value from userspace */
        error = SYSCTL_IN(req, &input[0], size_inval);
        if (error) {
                return error;
        }

        test_oslog_handleOSLogCtl(input, outval, ARRCOUNT);

        error = SYSCTL_OUT(req, &outval[0], size_outval);

        return error;
}

SYSCTL_PROC(_debug,
    OID_AUTO,
    test_OSLogCtl,
    CTLFLAG_MASKED | CTLFLAG_ANYBODY | CTLTYPE_OPAQUE | CTLFLAG_RW | CTLFLAG_LOCKED,
    0,
    0,
    sysctl_debug_test_oslog_ctl,
    "I",
    "testing oslog in kernel");

#include <mach/task.h>
#include <mach/semaphore.h>

extern lck_grp_t * sysctl_debug_test_stackshot_owner_grp; /* used for both mutexes and rwlocks */
extern lck_mtx_t * sysctl_debug_test_stackshot_owner_init_mtx; /* used to protect lck_*_init */

/* This is a sysctl for testing collection of owner info on a lock in kernel space. A multi-threaded
 * test from userland sets this sysctl in such a way that a thread blocks in kernel mode, and a
 * stackshot is taken to see if the owner of the lock can be identified.
 *
 * We can't return to userland with a kernel lock held, so be sure to unlock before we leave.
 * the semaphores allow us to artificially create cases where the lock is being held and the
 * thread is hanging / taking a long time to do something. */

volatile char      sysctl_debug_test_stackshot_mtx_inited = 0;
semaphore_t        sysctl_debug_test_stackshot_mutex_sem;
lck_mtx_t          sysctl_debug_test_stackshot_owner_lck;

#define SYSCTL_DEBUG_MTX_ACQUIRE_WAIT   1
#define SYSCTL_DEBUG_MTX_ACQUIRE_NOWAIT 2
#define SYSCTL_DEBUG_MTX_SIGNAL         3
#define SYSCTL_DEBUG_MTX_TEARDOWN       4

STATIC int
sysctl_debug_test_stackshot_mutex_owner(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
        long long option = -1;
        /* if the user tries to read the sysctl, we tell them what the address of the lock is (to test against stackshot's output) */
        long long mtx_unslid_addr = (long long)VM_KERNEL_UNSLIDE_OR_PERM(&sysctl_debug_test_stackshot_owner_lck);
        int error = sysctl_io_number(req, mtx_unslid_addr, sizeof(long long), (void*)&option, NULL);

        lck_mtx_lock(sysctl_debug_test_stackshot_owner_init_mtx);
        if (!sysctl_debug_test_stackshot_mtx_inited) {
                lck_mtx_init(&sysctl_debug_test_stackshot_owner_lck,
                    sysctl_debug_test_stackshot_owner_grp,
                    LCK_ATTR_NULL);
                semaphore_create(kernel_task,
                    &sysctl_debug_test_stackshot_mutex_sem,
                    SYNC_POLICY_FIFO, 0);
                sysctl_debug_test_stackshot_mtx_inited = 1;
        }
        lck_mtx_unlock(sysctl_debug_test_stackshot_owner_init_mtx);

        if (!error) {
                switch (option) {
                case SYSCTL_DEBUG_MTX_ACQUIRE_NOWAIT:
                        lck_mtx_lock(&sysctl_debug_test_stackshot_owner_lck);
                        lck_mtx_unlock(&sysctl_debug_test_stackshot_owner_lck);
                        break;
                case SYSCTL_DEBUG_MTX_ACQUIRE_WAIT:
                        lck_mtx_lock(&sysctl_debug_test_stackshot_owner_lck);
                        semaphore_wait(sysctl_debug_test_stackshot_mutex_sem);
                        lck_mtx_unlock(&sysctl_debug_test_stackshot_owner_lck);
                        break;
                case SYSCTL_DEBUG_MTX_SIGNAL:
                        semaphore_signal(sysctl_debug_test_stackshot_mutex_sem);
                        break;
                case SYSCTL_DEBUG_MTX_TEARDOWN:
                        lck_mtx_lock(sysctl_debug_test_stackshot_owner_init_mtx);

                        lck_mtx_destroy(&sysctl_debug_test_stackshot_owner_lck,
                            sysctl_debug_test_stackshot_owner_grp);
                        semaphore_destroy(kernel_task,
                            sysctl_debug_test_stackshot_mutex_sem);
                        sysctl_debug_test_stackshot_mtx_inited = 0;

                        lck_mtx_unlock(sysctl_debug_test_stackshot_owner_init_mtx);
                        break;
                case -1:         /* user just wanted to read the value, so do nothing */
                        break;
                default:
                        error = EINVAL;
                        break;
                }
        }
        return error;
}

/* we can't return to userland with a kernel rwlock held, so be sure to unlock before we leave.
 * the semaphores allow us to artificially create cases where the lock is being held and the
 * thread is hanging / taking a long time to do something. */

SYSCTL_PROC(_debug,
    OID_AUTO,
    test_MutexOwnerCtl,
    CTLFLAG_MASKED | CTLFLAG_ANYBODY | CTLTYPE_QUAD | CTLFLAG_RW | CTLFLAG_LOCKED,
    0,
    0,
    sysctl_debug_test_stackshot_mutex_owner,
    "-",
    "Testing mutex owner in kernel");

volatile char sysctl_debug_test_stackshot_rwlck_inited = 0;
lck_rw_t      sysctl_debug_test_stackshot_owner_rwlck;
semaphore_t   sysctl_debug_test_stackshot_rwlck_sem;

#define SYSCTL_DEBUG_KRWLCK_RACQUIRE_NOWAIT 1
#define SYSCTL_DEBUG_KRWLCK_RACQUIRE_WAIT   2
#define SYSCTL_DEBUG_KRWLCK_WACQUIRE_NOWAIT 3
#define SYSCTL_DEBUG_KRWLCK_WACQUIRE_WAIT   4
#define SYSCTL_DEBUG_KRWLCK_SIGNAL          5
#define SYSCTL_DEBUG_KRWLCK_TEARDOWN        6

STATIC int
sysctl_debug_test_stackshot_rwlck_owner(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
        long long option = -1;
        /* if the user tries to read the sysctl, we tell them what the address of the lock is
         * (to test against stackshot's output) */
        long long rwlck_unslid_addr = (long long)VM_KERNEL_UNSLIDE_OR_PERM(&sysctl_debug_test_stackshot_owner_rwlck);
        int error = sysctl_io_number(req, rwlck_unslid_addr, sizeof(long long), (void*)&option, NULL);

        lck_mtx_lock(sysctl_debug_test_stackshot_owner_init_mtx);
        if (!sysctl_debug_test_stackshot_rwlck_inited) {
                lck_rw_init(&sysctl_debug_test_stackshot_owner_rwlck,
                    sysctl_debug_test_stackshot_owner_grp,
                    LCK_ATTR_NULL);
                semaphore_create(kernel_task,
                    &sysctl_debug_test_stackshot_rwlck_sem,
                    SYNC_POLICY_FIFO,
                    0);
                sysctl_debug_test_stackshot_rwlck_inited = 1;
        }
        lck_mtx_unlock(sysctl_debug_test_stackshot_owner_init_mtx);

        if (!error) {
                switch (option) {
                case SYSCTL_DEBUG_KRWLCK_RACQUIRE_NOWAIT:
                        lck_rw_lock(&sysctl_debug_test_stackshot_owner_rwlck, LCK_RW_TYPE_SHARED);
                        lck_rw_unlock(&sysctl_debug_test_stackshot_owner_rwlck, LCK_RW_TYPE_SHARED);
                        break;
                case SYSCTL_DEBUG_KRWLCK_RACQUIRE_WAIT:
                        lck_rw_lock(&sysctl_debug_test_stackshot_owner_rwlck, LCK_RW_TYPE_SHARED);
                        semaphore_wait(sysctl_debug_test_stackshot_rwlck_sem);
                        lck_rw_unlock(&sysctl_debug_test_stackshot_owner_rwlck, LCK_RW_TYPE_SHARED);
                        break;
                case SYSCTL_DEBUG_KRWLCK_WACQUIRE_NOWAIT:
                        lck_rw_lock(&sysctl_debug_test_stackshot_owner_rwlck, LCK_RW_TYPE_EXCLUSIVE);
                        lck_rw_unlock(&sysctl_debug_test_stackshot_owner_rwlck, LCK_RW_TYPE_EXCLUSIVE);
                        break;
                case SYSCTL_DEBUG_KRWLCK_WACQUIRE_WAIT:
                        lck_rw_lock(&sysctl_debug_test_stackshot_owner_rwlck, LCK_RW_TYPE_EXCLUSIVE);
                        semaphore_wait(sysctl_debug_test_stackshot_rwlck_sem);
                        lck_rw_unlock(&sysctl_debug_test_stackshot_owner_rwlck, LCK_RW_TYPE_EXCLUSIVE);
                        break;
                case SYSCTL_DEBUG_KRWLCK_SIGNAL:
                        semaphore_signal(sysctl_debug_test_stackshot_rwlck_sem);
                        break;
                case SYSCTL_DEBUG_KRWLCK_TEARDOWN:
                        lck_mtx_lock(sysctl_debug_test_stackshot_owner_init_mtx);

                        lck_rw_destroy(&sysctl_debug_test_stackshot_owner_rwlck,
                            sysctl_debug_test_stackshot_owner_grp);
                        semaphore_destroy(kernel_task,
                            sysctl_debug_test_stackshot_rwlck_sem);
                        sysctl_debug_test_stackshot_rwlck_inited = 0;

                        lck_mtx_unlock(sysctl_debug_test_stackshot_owner_init_mtx);
                        break;
                case -1:         /* user just wanted to read the value, so do nothing */
                        break;
                default:
                        error = EINVAL;
                        break;
                }
        }
        return error;
}


SYSCTL_PROC(_debug,
    OID_AUTO,
    test_RWLockOwnerCtl,
    CTLFLAG_MASKED | CTLFLAG_ANYBODY | CTLTYPE_QUAD | CTLFLAG_RW | CTLFLAG_LOCKED,
    0,
    0,
    sysctl_debug_test_stackshot_rwlck_owner,
    "-",
    "Testing rwlock owner in kernel");
#endif /* !CONFIG_XNUPOST */

STATIC int
sysctl_swapusage
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
        int                     error;
        uint64_t                swap_total;
        uint64_t                swap_avail;
        vm_size_t               swap_pagesize;
        boolean_t               swap_encrypted;
        struct xsw_usage        xsu = {};

        error = macx_swapinfo(&swap_total,
            &swap_avail,
            &swap_pagesize,
            &swap_encrypted);
        if (error) {
                return error;
        }

        xsu.xsu_total = swap_total;
        xsu.xsu_avail = swap_avail;
        xsu.xsu_used = swap_total - swap_avail;
        xsu.xsu_pagesize = swap_pagesize;
        xsu.xsu_encrypted = swap_encrypted;
        return sysctl_io_opaque(req, &xsu, sizeof(xsu), NULL);
}



SYSCTL_PROC(_vm, VM_SWAPUSAGE, swapusage,
    CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_LOCKED,
    0, 0, sysctl_swapusage, "S,xsw_usage", "");

#if CONFIG_FREEZE
extern void vm_page_reactivate_all_throttled(void);
extern void memorystatus_disable_freeze(void);

static int
sysctl_freeze_enabled SYSCTL_HANDLER_ARGS
{
#pragma unused(arg1, arg2)
        int error, val = memorystatus_freeze_enabled ? 1 : 0;
        boolean_t disabled;

        error = sysctl_handle_int(oidp, &val, 0, req);
        if (error || !req->newptr) {
                return error;
        }

        if (!VM_CONFIG_FREEZER_SWAP_IS_ACTIVE) {
                //assert(req->newptr);
                printf("Failed attempt to set vm.freeze_enabled sysctl\n");
                return EINVAL;
        }

        /*
         * If freeze is being disabled, we need to move dirty pages out from the throttle to the active queue.
         */
        disabled = (!val && memorystatus_freeze_enabled);

        memorystatus_freeze_enabled = val ? TRUE : FALSE;

        if (disabled) {
                vm_page_reactivate_all_throttled();
                memorystatus_disable_freeze();
        }

        return 0;
}

SYSCTL_PROC(_vm, OID_AUTO, freeze_enabled, CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_ANYBODY, &memorystatus_freeze_enabled, 0, sysctl_freeze_enabled, "I", "");
#endif /* CONFIG_FREEZE */

#if DEVELOPMENT || DEBUG
extern int vm_num_swap_files_config;
extern int vm_num_swap_files;
extern lck_mtx_t vm_swap_data_lock;
#define VM_MAX_SWAP_FILE_NUM            100

static int
sysctl_vm_config_num_swap_files SYSCTL_HANDLER_ARGS
{
#pragma unused(arg1, arg2)
        int error = 0, val = vm_num_swap_files_config;

        error = sysctl_handle_int(oidp, &val, 0, req);
        if (error || !req->newptr) {
                goto out;
        }

        if (!VM_CONFIG_SWAP_IS_ACTIVE && !VM_CONFIG_FREEZER_SWAP_IS_ACTIVE) {
                printf("Swap is disabled\n");
                error = EINVAL;
                goto out;
        }

        lck_mtx_lock(&vm_swap_data_lock);

        if (val < vm_num_swap_files) {
                printf("Cannot configure fewer swap files than already exist.\n");
                error = EINVAL;
                lck_mtx_unlock(&vm_swap_data_lock);
                goto out;
        }

        if (val > VM_MAX_SWAP_FILE_NUM) {
                printf("Capping number of swap files to upper bound.\n");
                val = VM_MAX_SWAP_FILE_NUM;
        }

        vm_num_swap_files_config = val;
        lck_mtx_unlock(&vm_swap_data_lock);
out:

        return 0;
}

SYSCTL_PROC(_debug, OID_AUTO, num_swap_files_configured, CTLFLAG_ANYBODY | CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED, 0, 0, sysctl_vm_config_num_swap_files, "I", "");
#endif /* DEVELOPMENT || DEBUG */

/* this kernel does NOT implement shared_region_make_private_np() */
SYSCTL_INT(_kern, KERN_SHREG_PRIVATIZABLE, shreg_private,
    CTLFLAG_RD | CTLFLAG_LOCKED,
    (int *)NULL, 0, "");

STATIC int
fetch_process_cputype(
        proc_t cur_proc,
        int *name,
        u_int namelen,
        cpu_type_t *cputype)
{
        proc_t p = PROC_NULL;
        int refheld = 0;
        cpu_type_t ret = 0;
        int error = 0;

        if (namelen == 0) {
                p = cur_proc;
        } else if (namelen == 1) {
                p = proc_find(name[0]);
                if (p == NULL) {
                        return EINVAL;
                }
                refheld = 1;
        } else {
                error = EINVAL;
                goto out;
        }

        ret = cpu_type() & ~CPU_ARCH_MASK;
        if (IS_64BIT_PROCESS(p)) {
                ret |= CPU_ARCH_ABI64;
        }

        *cputype = ret;

        if (refheld != 0) {
                proc_rele(p);
        }
out:
        return error;
}

STATIC int
sysctl_sysctl_native(__unused struct sysctl_oid *oidp, void *arg1, int arg2,
    struct sysctl_req *req)
{
        int error;
        cpu_type_t proc_cputype = 0;
        if ((error = fetch_process_cputype(req->p, (int *)arg1, arg2, &proc_cputype)) != 0) {
                return error;
        }
        int res = 1;
        if ((proc_cputype & ~CPU_ARCH_MASK) != (cpu_type() & ~CPU_ARCH_MASK)) {
                res = 0;
        }
        return SYSCTL_OUT(req, &res, sizeof(res));
}
SYSCTL_PROC(_sysctl, OID_AUTO, proc_native, CTLTYPE_NODE | CTLFLAG_RD | CTLFLAG_LOCKED, 0, 0, sysctl_sysctl_native, "I", "proc_native");

STATIC int
sysctl_sysctl_cputype(__unused struct sysctl_oid *oidp, void *arg1, int arg2,
    struct sysctl_req *req)
{
        int error;
        cpu_type_t proc_cputype = 0;
        if ((error = fetch_process_cputype(req->p, (int *)arg1, arg2, &proc_cputype)) != 0) {
                return error;
        }
        return SYSCTL_OUT(req, &proc_cputype, sizeof(proc_cputype));
}
SYSCTL_PROC(_sysctl, OID_AUTO, proc_cputype, CTLTYPE_NODE | CTLFLAG_RD | CTLFLAG_LOCKED, 0, 0, sysctl_sysctl_cputype, "I", "proc_cputype");

STATIC int
sysctl_safeboot
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
        return sysctl_io_number(req, boothowto & RB_SAFEBOOT ? 1 : 0, sizeof(int), NULL, NULL);
}

SYSCTL_PROC(_kern, KERN_SAFEBOOT, safeboot,
    CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_LOCKED,
    0, 0, sysctl_safeboot, "I", "");

STATIC int
sysctl_singleuser
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
        return sysctl_io_number(req, boothowto & RB_SINGLE ? 1 : 0, sizeof(int), NULL, NULL);
}

SYSCTL_PROC(_kern, OID_AUTO, singleuser,
    CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_LOCKED,
    0, 0, sysctl_singleuser, "I", "");

STATIC int
sysctl_minimalboot
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
        return sysctl_io_number(req, minimalboot, sizeof(int), NULL, NULL);
}

SYSCTL_PROC(_kern, OID_AUTO, minimalboot,
    CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_LOCKED,
    0, 0, sysctl_minimalboot, "I", "");

/*
 * Controls for debugging affinity sets - see osfmk/kern/affinity.c
 */
extern boolean_t        affinity_sets_enabled;
extern int              affinity_sets_mapping;

SYSCTL_INT(_kern, OID_AUTO, affinity_sets_enabled,
    CTLFLAG_RW | CTLFLAG_LOCKED, (int *) &affinity_sets_enabled, 0, "hinting enabled");
SYSCTL_INT(_kern, OID_AUTO, affinity_sets_mapping,
    CTLFLAG_RW | CTLFLAG_LOCKED, &affinity_sets_mapping, 0, "mapping policy");

/*
 * Boolean indicating if KASLR is active.
 */
STATIC int
sysctl_slide
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
        uint32_t        slide;

        slide = vm_kernel_slide ? 1 : 0;

        return sysctl_io_number( req, slide, sizeof(int), NULL, NULL);
}

SYSCTL_PROC(_kern, OID_AUTO, slide,
    CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_LOCKED,
    0, 0, sysctl_slide, "I", "");

/*
 * Limit on total memory users can wire.
 *
 * vm_global_user_wire_limit - system wide limit on wired memory from all processes combined.
 *
 * vm_user_wire_limit - per address space limit on wired memory.  This puts a cap on the process's rlimit value.
 *
 * These values are initialized to reasonable defaults at boot time based on the available physical memory in
 * kmem_init().
 *
 * All values are in bytes.
 */

vm_map_size_t   vm_global_no_user_wire_amount;
vm_map_size_t   vm_global_user_wire_limit;
vm_map_size_t   vm_user_wire_limit;

/*
 * There needs to be a more automatic/elegant way to do this
 */
#if defined(__ARM__)
SYSCTL_INT(_vm, OID_AUTO, global_no_user_wire_amount, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_global_no_user_wire_amount, 0, "");
SYSCTL_INT(_vm, OID_AUTO, global_user_wire_limit, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_global_user_wire_limit, 0, "");
SYSCTL_INT(_vm, OID_AUTO, user_wire_limit, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_user_wire_limit, 0, "");
#else
SYSCTL_QUAD(_vm, OID_AUTO, global_no_user_wire_amount, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_global_no_user_wire_amount, "");
SYSCTL_QUAD(_vm, OID_AUTO, global_user_wire_limit, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_global_user_wire_limit, "");
SYSCTL_QUAD(_vm, OID_AUTO, user_wire_limit, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_user_wire_limit, "");
#endif

extern int vm_map_copy_overwrite_aligned_src_not_internal;
extern int vm_map_copy_overwrite_aligned_src_not_symmetric;
extern int vm_map_copy_overwrite_aligned_src_large;
SYSCTL_INT(_vm, OID_AUTO, vm_copy_src_not_internal, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_map_copy_overwrite_aligned_src_not_internal, 0, "");
SYSCTL_INT(_vm, OID_AUTO, vm_copy_src_not_symmetric, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_map_copy_overwrite_aligned_src_not_symmetric, 0, "");
SYSCTL_INT(_vm, OID_AUTO, vm_copy_src_large, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_map_copy_overwrite_aligned_src_large, 0, "");


extern uint32_t vm_page_external_count;

SYSCTL_INT(_vm, OID_AUTO, vm_page_external_count, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_page_external_count, 0, "");

SYSCTL_INT(_vm, OID_AUTO, vm_page_filecache_min, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_pageout_state.vm_page_filecache_min, 0, "");
SYSCTL_INT(_vm, OID_AUTO, vm_page_xpmapped_min, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_pageout_state.vm_page_xpmapped_min, 0, "");

#if DEVELOPMENT || DEBUG
SYSCTL_INT(_vm, OID_AUTO, vm_page_filecache_min_divisor, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_pageout_state.vm_page_filecache_min_divisor, 0, "");
SYSCTL_INT(_vm, OID_AUTO, vm_page_xpmapped_min_divisor, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_pageout_state.vm_page_xpmapped_min_divisor, 0, "");
#endif

extern int      vm_compressor_mode;
extern int      vm_compressor_is_active;
extern int      vm_compressor_available;
extern uint32_t vm_ripe_target_age;
extern uint32_t swapout_target_age;
extern int64_t  compressor_bytes_used;
extern int64_t  c_segment_input_bytes;
extern int64_t  c_segment_compressed_bytes;
extern uint32_t compressor_eval_period_in_msecs;
extern uint32_t compressor_sample_min_in_msecs;
extern uint32_t compressor_sample_max_in_msecs;
extern uint32_t compressor_thrashing_threshold_per_10msecs;
extern uint32_t compressor_thrashing_min_per_10msecs;
extern uint32_t vm_compressor_time_thread;

#if DEVELOPMENT || DEBUG
extern uint32_t vm_compressor_minorcompact_threshold_divisor;
extern uint32_t vm_compressor_majorcompact_threshold_divisor;
extern uint32_t vm_compressor_unthrottle_threshold_divisor;
extern uint32_t vm_compressor_catchup_threshold_divisor;

extern uint32_t vm_compressor_minorcompact_threshold_divisor_overridden;
extern uint32_t vm_compressor_majorcompact_threshold_divisor_overridden;
extern uint32_t vm_compressor_unthrottle_threshold_divisor_overridden;
extern uint32_t vm_compressor_catchup_threshold_divisor_overridden;

extern vmct_stats_t vmct_stats;


STATIC int
sysctl_minorcompact_threshold_divisor(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
        int new_value, changed;
        int error = sysctl_io_number(req, vm_compressor_minorcompact_threshold_divisor, sizeof(int), &new_value, &changed);

        if (changed) {
                vm_compressor_minorcompact_threshold_divisor = new_value;
                vm_compressor_minorcompact_threshold_divisor_overridden = 1;
        }
        return error;
}

SYSCTL_PROC(_vm, OID_AUTO, compressor_minorcompact_threshold_divisor,
    CTLTYPE_INT | CTLFLAG_LOCKED | CTLFLAG_RW,
    0, 0, sysctl_minorcompact_threshold_divisor, "I", "");


STATIC int
sysctl_majorcompact_threshold_divisor(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
        int new_value, changed;
        int error = sysctl_io_number(req, vm_compressor_majorcompact_threshold_divisor, sizeof(int), &new_value, &changed);

        if (changed) {
                vm_compressor_majorcompact_threshold_divisor = new_value;
                vm_compressor_majorcompact_threshold_divisor_overridden = 1;
        }
        return error;
}

SYSCTL_PROC(_vm, OID_AUTO, compressor_majorcompact_threshold_divisor,
    CTLTYPE_INT | CTLFLAG_LOCKED | CTLFLAG_RW,
    0, 0, sysctl_majorcompact_threshold_divisor, "I", "");


STATIC int
sysctl_unthrottle_threshold_divisor(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
        int new_value, changed;
        int error = sysctl_io_number(req, vm_compressor_unthrottle_threshold_divisor, sizeof(int), &new_value, &changed);

        if (changed) {
                vm_compressor_unthrottle_threshold_divisor = new_value;
                vm_compressor_unthrottle_threshold_divisor_overridden = 1;
        }
        return error;
}

SYSCTL_PROC(_vm, OID_AUTO, compressor_unthrottle_threshold_divisor,
    CTLTYPE_INT | CTLFLAG_LOCKED | CTLFLAG_RW,
    0, 0, sysctl_unthrottle_threshold_divisor, "I", "");


STATIC int
sysctl_catchup_threshold_divisor(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
        int new_value, changed;
        int error = sysctl_io_number(req, vm_compressor_catchup_threshold_divisor, sizeof(int), &new_value, &changed);

        if (changed) {
                vm_compressor_catchup_threshold_divisor = new_value;
                vm_compressor_catchup_threshold_divisor_overridden = 1;
        }
        return error;
}

SYSCTL_PROC(_vm, OID_AUTO, compressor_catchup_threshold_divisor,
    CTLTYPE_INT | CTLFLAG_LOCKED | CTLFLAG_RW,
    0, 0, sysctl_catchup_threshold_divisor, "I", "");
#endif


SYSCTL_QUAD(_vm, OID_AUTO, compressor_input_bytes, CTLFLAG_RD | CTLFLAG_LOCKED, &c_segment_input_bytes, "");
SYSCTL_QUAD(_vm, OID_AUTO, compressor_compressed_bytes, CTLFLAG_RD | CTLFLAG_LOCKED, &c_segment_compressed_bytes, "");
SYSCTL_QUAD(_vm, OID_AUTO, compressor_bytes_used, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_bytes_used, "");

SYSCTL_INT(_vm, OID_AUTO, compressor_mode, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_compressor_mode, 0, "");
SYSCTL_INT(_vm, OID_AUTO, compressor_is_active, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_compressor_is_active, 0, "");
SYSCTL_INT(_vm, OID_AUTO, compressor_swapout_target_age, CTLFLAG_RD | CTLFLAG_LOCKED, &swapout_target_age, 0, "");
SYSCTL_INT(_vm, OID_AUTO, compressor_available, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_compressor_available, 0, "");

SYSCTL_INT(_vm, OID_AUTO, vm_ripe_target_age_in_secs, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_ripe_target_age, 0, "");

SYSCTL_INT(_vm, OID_AUTO, compressor_eval_period_in_msecs, CTLFLAG_RW | CTLFLAG_LOCKED, &compressor_eval_period_in_msecs, 0, "");
SYSCTL_INT(_vm, OID_AUTO, compressor_sample_min_in_msecs, CTLFLAG_RW | CTLFLAG_LOCKED, &compressor_sample_min_in_msecs, 0, "");
SYSCTL_INT(_vm, OID_AUTO, compressor_sample_max_in_msecs, CTLFLAG_RW | CTLFLAG_LOCKED, &compressor_sample_max_in_msecs, 0, "");
SYSCTL_INT(_vm, OID_AUTO, compressor_thrashing_threshold_per_10msecs, CTLFLAG_RW | CTLFLAG_LOCKED, &compressor_thrashing_threshold_per_10msecs, 0, "");
SYSCTL_INT(_vm, OID_AUTO, compressor_thrashing_min_per_10msecs, CTLFLAG_RW | CTLFLAG_LOCKED, &compressor_thrashing_min_per_10msecs, 0, "");

SYSCTL_STRING(_vm, OID_AUTO, swapfileprefix, CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_LOCKED, swapfilename, sizeof(swapfilename) - SWAPFILENAME_INDEX_LEN, "");

SYSCTL_INT(_vm, OID_AUTO, compressor_timing_enabled, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_compressor_time_thread, 0, "");

#if DEVELOPMENT || DEBUG
SYSCTL_QUAD(_vm, OID_AUTO, compressor_thread_runtime0, CTLFLAG_RD | CTLFLAG_LOCKED, &vmct_stats.vmct_runtimes[0], "");
SYSCTL_QUAD(_vm, OID_AUTO, compressor_thread_runtime1, CTLFLAG_RD | CTLFLAG_LOCKED, &vmct_stats.vmct_runtimes[1], "");

SYSCTL_QUAD(_vm, OID_AUTO, compressor_threads_total, CTLFLAG_RD | CTLFLAG_LOCKED, &vmct_stats.vmct_cthreads_total, "");

SYSCTL_QUAD(_vm, OID_AUTO, compressor_thread_pages0, CTLFLAG_RD | CTLFLAG_LOCKED, &vmct_stats.vmct_pages[0], "");
SYSCTL_QUAD(_vm, OID_AUTO, compressor_thread_pages1, CTLFLAG_RD | CTLFLAG_LOCKED, &vmct_stats.vmct_pages[1], "");

SYSCTL_QUAD(_vm, OID_AUTO, compressor_thread_iterations0, CTLFLAG_RD | CTLFLAG_LOCKED, &vmct_stats.vmct_iterations[0], "");
SYSCTL_QUAD(_vm, OID_AUTO, compressor_thread_iterations1, CTLFLAG_RD | CTLFLAG_LOCKED, &vmct_stats.vmct_iterations[1], "");

SYSCTL_INT(_vm, OID_AUTO, compressor_thread_minpages0, CTLFLAG_RD | CTLFLAG_LOCKED, &vmct_stats.vmct_minpages[0], 0, "");
SYSCTL_INT(_vm, OID_AUTO, compressor_thread_minpages1, CTLFLAG_RD | CTLFLAG_LOCKED, &vmct_stats.vmct_minpages[1], 0, "");

SYSCTL_INT(_vm, OID_AUTO, compressor_thread_maxpages0, CTLFLAG_RD | CTLFLAG_LOCKED, &vmct_stats.vmct_maxpages[0], 0, "");
SYSCTL_INT(_vm, OID_AUTO, compressor_thread_maxpages1, CTLFLAG_RD | CTLFLAG_LOCKED, &vmct_stats.vmct_maxpages[1], 0, "");

#endif

SYSCTL_QUAD(_vm, OID_AUTO, lz4_compressions, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.lz4_compressions, "");
SYSCTL_QUAD(_vm, OID_AUTO, lz4_compression_failures, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.lz4_compression_failures, "");
SYSCTL_QUAD(_vm, OID_AUTO, lz4_compressed_bytes, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.lz4_compressed_bytes, "");
SYSCTL_QUAD(_vm, OID_AUTO, lz4_wk_compression_delta, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.lz4_wk_compression_delta, "");
SYSCTL_QUAD(_vm, OID_AUTO, lz4_wk_compression_negative_delta, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.lz4_wk_compression_negative_delta, "");

SYSCTL_QUAD(_vm, OID_AUTO, lz4_decompressions, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.lz4_decompressions, "");
SYSCTL_QUAD(_vm, OID_AUTO, lz4_decompressed_bytes, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.lz4_decompressed_bytes, "");

SYSCTL_QUAD(_vm, OID_AUTO, uc_decompressions, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.uc_decompressions, "");

SYSCTL_QUAD(_vm, OID_AUTO, wk_compressions, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wk_compressions, "");

SYSCTL_QUAD(_vm, OID_AUTO, wk_catime, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wk_cabstime, "");

SYSCTL_QUAD(_vm, OID_AUTO, wkh_catime, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wkh_cabstime, "");
SYSCTL_QUAD(_vm, OID_AUTO, wkh_compressions, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wkh_compressions, "");

SYSCTL_QUAD(_vm, OID_AUTO, wks_catime, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wks_cabstime, "");
SYSCTL_QUAD(_vm, OID_AUTO, wks_compressions, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wks_compressions, "");

SYSCTL_QUAD(_vm, OID_AUTO, wk_compressions_exclusive, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wk_compressions_exclusive, "");
SYSCTL_QUAD(_vm, OID_AUTO, wk_sv_compressions, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wk_sv_compressions, "");
SYSCTL_QUAD(_vm, OID_AUTO, wk_mzv_compressions, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wk_mzv_compressions, "");
SYSCTL_QUAD(_vm, OID_AUTO, wk_compression_failures, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wk_compression_failures, "");
SYSCTL_QUAD(_vm, OID_AUTO, wk_compressed_bytes_exclusive, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wk_compressed_bytes_exclusive, "");
SYSCTL_QUAD(_vm, OID_AUTO, wk_compressed_bytes_total, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wk_compressed_bytes_total, "");

SYSCTL_QUAD(_vm, OID_AUTO, wks_compressed_bytes, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wks_compressed_bytes, "");
SYSCTL_QUAD(_vm, OID_AUTO, wks_compression_failures, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wks_compression_failures, "");
SYSCTL_QUAD(_vm, OID_AUTO, wks_sv_compressions, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wks_sv_compressions, "");


SYSCTL_QUAD(_vm, OID_AUTO, wk_decompressions, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wk_decompressions, "");

SYSCTL_QUAD(_vm, OID_AUTO, wk_datime, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wk_dabstime, "");

SYSCTL_QUAD(_vm, OID_AUTO, wkh_datime, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wkh_dabstime, "");
SYSCTL_QUAD(_vm, OID_AUTO, wkh_decompressions, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wkh_decompressions, "");

SYSCTL_QUAD(_vm, OID_AUTO, wks_datime, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wks_dabstime, "");
SYSCTL_QUAD(_vm, OID_AUTO, wks_decompressions, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wks_decompressions, "");

SYSCTL_QUAD(_vm, OID_AUTO, wk_decompressed_bytes, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wk_decompressed_bytes, "");
SYSCTL_QUAD(_vm, OID_AUTO, wk_sv_decompressions, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wk_sv_decompressions, "");

SYSCTL_INT(_vm, OID_AUTO, lz4_threshold, CTLFLAG_RW | CTLFLAG_LOCKED, &vmctune.lz4_threshold, 0, "");
SYSCTL_INT(_vm, OID_AUTO, wkdm_reeval_threshold, CTLFLAG_RW | CTLFLAG_LOCKED, &vmctune.wkdm_reeval_threshold, 0, "");
SYSCTL_INT(_vm, OID_AUTO, lz4_max_failure_skips, CTLFLAG_RW | CTLFLAG_LOCKED, &vmctune.lz4_max_failure_skips, 0, "");
SYSCTL_INT(_vm, OID_AUTO, lz4_max_failure_run_length, CTLFLAG_RW | CTLFLAG_LOCKED, &vmctune.lz4_max_failure_run_length, 0, "");
SYSCTL_INT(_vm, OID_AUTO, lz4_max_preselects, CTLFLAG_RW | CTLFLAG_LOCKED, &vmctune.lz4_max_preselects, 0, "");
SYSCTL_INT(_vm, OID_AUTO, lz4_run_preselection_threshold, CTLFLAG_RW | CTLFLAG_LOCKED, &vmctune.lz4_run_preselection_threshold, 0, "");
SYSCTL_INT(_vm, OID_AUTO, lz4_run_continue_bytes, CTLFLAG_RW | CTLFLAG_LOCKED, &vmctune.lz4_run_continue_bytes, 0, "");
SYSCTL_INT(_vm, OID_AUTO, lz4_profitable_bytes, CTLFLAG_RW | CTLFLAG_LOCKED, &vmctune.lz4_profitable_bytes, 0, "");
#if DEVELOPMENT || DEBUG
extern int vm_compressor_current_codec;
extern int vm_compressor_test_seg_wp;
extern boolean_t vm_compressor_force_sw_wkdm;
SYSCTL_INT(_vm, OID_AUTO, compressor_codec, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_compressor_current_codec, 0, "");
SYSCTL_INT(_vm, OID_AUTO, compressor_test_wp, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_compressor_test_seg_wp, 0, "");

SYSCTL_INT(_vm, OID_AUTO, wksw_force, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_compressor_force_sw_wkdm, 0, "");
extern int precompy, wkswhw;

SYSCTL_INT(_vm, OID_AUTO, precompy, CTLFLAG_RW | CTLFLAG_LOCKED, &precompy, 0, "");
SYSCTL_INT(_vm, OID_AUTO, wkswhw, CTLFLAG_RW | CTLFLAG_LOCKED, &wkswhw, 0, "");
extern unsigned int vm_ktrace_enabled;
SYSCTL_INT(_vm, OID_AUTO, vm_ktrace, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_ktrace_enabled, 0, "");
#endif

#if CONFIG_PHANTOM_CACHE
extern uint32_t phantom_cache_thrashing_threshold;
extern uint32_t phantom_cache_eval_period_in_msecs;
extern uint32_t phantom_cache_thrashing_threshold_ssd;


SYSCTL_INT(_vm, OID_AUTO, phantom_cache_eval_period_in_msecs, CTLFLAG_RW | CTLFLAG_LOCKED, &phantom_cache_eval_period_in_msecs, 0, "");
SYSCTL_INT(_vm, OID_AUTO, phantom_cache_thrashing_threshold, CTLFLAG_RW | CTLFLAG_LOCKED, &phantom_cache_thrashing_threshold, 0, "");
SYSCTL_INT(_vm, OID_AUTO, phantom_cache_thrashing_threshold_ssd, CTLFLAG_RW | CTLFLAG_LOCKED, &phantom_cache_thrashing_threshold_ssd, 0, "");
#endif

#if CONFIG_BACKGROUND_QUEUE

extern uint32_t vm_page_background_count;
extern uint32_t vm_page_background_target;
extern uint32_t vm_page_background_internal_count;
extern uint32_t vm_page_background_external_count;
extern uint32_t vm_page_background_mode;
extern uint32_t vm_page_background_exclude_external;
extern uint64_t vm_page_background_promoted_count;
extern uint64_t vm_pageout_rejected_bq_internal;
extern uint64_t vm_pageout_rejected_bq_external;

SYSCTL_INT(_vm, OID_AUTO, vm_page_background_mode, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_page_background_mode, 0, "");
SYSCTL_INT(_vm, OID_AUTO, vm_page_background_exclude_external, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_page_background_exclude_external, 0, "");
SYSCTL_INT(_vm, OID_AUTO, vm_page_background_target, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_page_background_target, 0, "");
SYSCTL_INT(_vm, OID_AUTO, vm_page_background_count, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_page_background_count, 0, "");
SYSCTL_INT(_vm, OID_AUTO, vm_page_background_internal_count, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_page_background_internal_count, 0, "");
SYSCTL_INT(_vm, OID_AUTO, vm_page_background_external_count, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_page_background_external_count, 0, "");

SYSCTL_QUAD(_vm, OID_AUTO, vm_page_background_promoted_count, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_page_background_promoted_count, "");
SYSCTL_QUAD(_vm, OID_AUTO, vm_pageout_considered_bq_internal, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_pageout_vminfo.vm_pageout_considered_bq_internal, "");
SYSCTL_QUAD(_vm, OID_AUTO, vm_pageout_considered_bq_external, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_pageout_vminfo.vm_pageout_considered_bq_external, "");
SYSCTL_QUAD(_vm, OID_AUTO, vm_pageout_rejected_bq_internal, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_pageout_rejected_bq_internal, "");
SYSCTL_QUAD(_vm, OID_AUTO, vm_pageout_rejected_bq_external, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_pageout_rejected_bq_external, "");

#endif /* CONFIG_BACKGROUND_QUEUE */

extern void vm_update_darkwake_mode(boolean_t);
extern boolean_t vm_darkwake_mode;

STATIC int
sysctl_toggle_darkwake_mode(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
        int new_value, changed;
        int error = sysctl_io_number(req, vm_darkwake_mode, sizeof(int), &new_value, &changed);

        if (!error && changed) {
                if (new_value != 0 && new_value != 1) {
                        printf("Error: Invalid value passed to darkwake sysctl. Acceptable: 0 or 1.\n");
                        error = EINVAL;
                } else {
                        vm_update_darkwake_mode((boolean_t) new_value);
                }
        }

        return error;
}

SYSCTL_PROC(_vm, OID_AUTO, darkwake_mode,
    CTLTYPE_INT | CTLFLAG_LOCKED | CTLFLAG_RW,
    0, 0, sysctl_toggle_darkwake_mode, "I", "");

#if (DEVELOPMENT || DEBUG)

SYSCTL_UINT(_vm, OID_AUTO, vm_page_creation_throttled_hard,
    CTLFLAG_RD | CTLFLAG_KERN | CTLFLAG_LOCKED,
    &vm_page_creation_throttled_hard, 0, "");

SYSCTL_UINT(_vm, OID_AUTO, vm_page_creation_throttled_soft,
    CTLFLAG_RD | CTLFLAG_KERN | CTLFLAG_LOCKED,
    &vm_page_creation_throttled_soft, 0, "");

extern uint32_t vm_pageout_memorystatus_fb_factor_nr;
extern uint32_t vm_pageout_memorystatus_fb_factor_dr;
SYSCTL_INT(_vm, OID_AUTO, vm_pageout_memorystatus_fb_factor_nr, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_pageout_memorystatus_fb_factor_nr, 0, "");
SYSCTL_INT(_vm, OID_AUTO, vm_pageout_memorystatus_fb_factor_dr, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_pageout_memorystatus_fb_factor_dr, 0, "");


SYSCTL_INT(_vm, OID_AUTO, vm_grab_anon_overrides, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_pageout_debug.vm_grab_anon_overrides, 0, "");
SYSCTL_INT(_vm, OID_AUTO, vm_grab_anon_nops, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_pageout_debug.vm_grab_anon_nops, 0, "");

/* log message counters for persistence mode */
extern uint32_t oslog_p_total_msgcount;
extern uint32_t oslog_p_metadata_saved_msgcount;
extern uint32_t oslog_p_metadata_dropped_msgcount;
extern uint32_t oslog_p_error_count;
extern uint32_t oslog_p_saved_msgcount;
extern uint32_t oslog_p_dropped_msgcount;
extern uint32_t oslog_p_boot_dropped_msgcount;

/* log message counters for streaming mode */
extern uint32_t oslog_s_total_msgcount;
extern uint32_t oslog_s_metadata_msgcount;
extern uint32_t oslog_s_error_count;
extern uint32_t oslog_s_streamed_msgcount;
extern uint32_t oslog_s_dropped_msgcount;

SYSCTL_UINT(_debug, OID_AUTO, oslog_p_total_msgcount, CTLFLAG_ANYBODY | CTLFLAG_RD | CTLFLAG_LOCKED, &oslog_p_total_msgcount, 0, "");
SYSCTL_UINT(_debug, OID_AUTO, oslog_p_metadata_saved_msgcount, CTLFLAG_ANYBODY | CTLFLAG_RD | CTLFLAG_LOCKED, &oslog_p_metadata_saved_msgcount, 0, "");
SYSCTL_UINT(_debug, OID_AUTO, oslog_p_metadata_dropped_msgcount, CTLFLAG_ANYBODY | CTLFLAG_RD | CTLFLAG_LOCKED, &oslog_p_metadata_dropped_msgcount, 0, "");
SYSCTL_UINT(_debug, OID_AUTO, oslog_p_error_count, CTLFLAG_ANYBODY | CTLFLAG_RD | CTLFLAG_LOCKED, &oslog_p_error_count, 0, "");
SYSCTL_UINT(_debug, OID_AUTO, oslog_p_saved_msgcount, CTLFLAG_ANYBODY | CTLFLAG_RD | CTLFLAG_LOCKED, &oslog_p_saved_msgcount, 0, "");
SYSCTL_UINT(_debug, OID_AUTO, oslog_p_dropped_msgcount, CTLFLAG_ANYBODY | CTLFLAG_RD | CTLFLAG_LOCKED, &oslog_p_dropped_msgcount, 0, "");
SYSCTL_UINT(_debug, OID_AUTO, oslog_p_boot_dropped_msgcount, CTLFLAG_ANYBODY | CTLFLAG_RD | CTLFLAG_LOCKED, &oslog_p_boot_dropped_msgcount, 0, "");

SYSCTL_UINT(_debug, OID_AUTO, oslog_s_total_msgcount, CTLFLAG_ANYBODY | CTLFLAG_RD | CTLFLAG_LOCKED, &oslog_s_total_msgcount, 0, "");
SYSCTL_UINT(_debug, OID_AUTO, oslog_s_metadata_msgcount, CTLFLAG_ANYBODY | CTLFLAG_RD | CTLFLAG_LOCKED, &oslog_s_metadata_msgcount, 0, "");
SYSCTL_UINT(_debug, OID_AUTO, oslog_s_error_count, CTLFLAG_ANYBODY | CTLFLAG_RD | CTLFLAG_LOCKED, &oslog_s_error_count, 0, "");
SYSCTL_UINT(_debug, OID_AUTO, oslog_s_streamed_msgcount, CTLFLAG_ANYBODY | CTLFLAG_RD | CTLFLAG_LOCKED, &oslog_s_streamed_msgcount, 0, "");
SYSCTL_UINT(_debug, OID_AUTO, oslog_s_dropped_msgcount, CTLFLAG_ANYBODY | CTLFLAG_RD | CTLFLAG_LOCKED, &oslog_s_dropped_msgcount, 0, "");


#endif /* DEVELOPMENT || DEBUG */

/*
 * Enable tracing of voucher contents
 */
extern uint32_t ipc_voucher_trace_contents;

SYSCTL_INT(_kern, OID_AUTO, ipc_voucher_trace_contents,
    CTLFLAG_RW | CTLFLAG_LOCKED, &ipc_voucher_trace_contents, 0, "Enable tracing voucher contents");

/*
 * Kernel stack size and depth
 */
SYSCTL_INT(_kern, OID_AUTO, stack_size,
    CTLFLAG_RD | CTLFLAG_LOCKED, (int *) &kernel_stack_size, 0, "Kernel stack size");
SYSCTL_INT(_kern, OID_AUTO, stack_depth_max,
    CTLFLAG_RD | CTLFLAG_LOCKED, (int *) &kernel_stack_depth_max, 0, "Max kernel stack depth at interrupt or context switch");

extern unsigned int kern_feature_overrides;
SYSCTL_INT(_kern, OID_AUTO, kern_feature_overrides,
    CTLFLAG_RD | CTLFLAG_LOCKED, &kern_feature_overrides, 0, "Kernel feature override mask");

/*
 * enable back trace for port allocations
 */
extern int ipc_portbt;

SYSCTL_INT(_kern, OID_AUTO, ipc_portbt,
    CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_LOCKED,
    &ipc_portbt, 0, "");

/*
 * Scheduler sysctls
 */

SYSCTL_STRING(_kern, OID_AUTO, sched,
    CTLFLAG_RD | CTLFLAG_KERN | CTLFLAG_LOCKED,
    sched_string, sizeof(sched_string),
    "Timeshare scheduler implementation");

#if CONFIG_QUIESCE_COUNTER
static int
sysctl_cpu_quiescent_counter_interval SYSCTL_HANDLER_ARGS
{
#pragma unused(arg1, arg2)

        int error = sysctl_handle_int(oidp, &cpu_checkin_min_interval_us, 0, req);
        if (error || !req->newptr) {
                return error;
        }

        cpu_quiescent_counter_set_min_interval_us(cpu_checkin_min_interval_us);

        return 0;
}

SYSCTL_PROC(_kern, OID_AUTO, cpu_checkin_interval,
    CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED,
    0, 0,
    sysctl_cpu_quiescent_counter_interval, "I",
    "Quiescent CPU checkin interval (microseconds)");
#endif /* CONFIG_QUIESCE_COUNTER */


/*
 * Only support runtime modification on embedded platforms
 * with development config enabled
 */
#if CONFIG_EMBEDDED
#if !SECURE_KERNEL
extern int precise_user_kernel_time;
SYSCTL_INT(_kern, OID_AUTO, precise_user_kernel_time,
    CTLFLAG_RW | CTLFLAG_LOCKED,
    &precise_user_kernel_time, 0, "Precise accounting of kernel vs. user time");
#endif
#endif


/* Parameters related to timer coalescing tuning, to be replaced
 * with a dedicated systemcall in the future.
 */
/* Enable processing pending timers in the context of any other interrupt
 * Coalescing tuning parameters for various thread/task attributes */
STATIC int
sysctl_timer_user_us_kernel_abstime SYSCTL_HANDLER_ARGS
{
#pragma unused(oidp)
        int size = arg2;        /* subcommand*/
        int error;
        int changed = 0;
        uint64_t old_value_ns;
        uint64_t new_value_ns;
        uint64_t value_abstime;
        if (size == sizeof(uint32_t)) {
                value_abstime = *((uint32_t *)arg1);
        } else if (size == sizeof(uint64_t)) {
                value_abstime = *((uint64_t *)arg1);
        } else {
                return ENOTSUP;
        }

        absolutetime_to_nanoseconds(value_abstime, &old_value_ns);
        error = sysctl_io_number(req, old_value_ns, sizeof(old_value_ns), &new_value_ns, &changed);
        if ((error) || (!changed)) {
                return error;
        }

        nanoseconds_to_absolutetime(new_value_ns, &value_abstime);
        if (size == sizeof(uint32_t)) {
                *((uint32_t *)arg1) = (uint32_t)value_abstime;
        } else {
                *((uint64_t *)arg1) = value_abstime;
        }
        return error;
}

SYSCTL_INT(_kern, OID_AUTO, timer_coalesce_bg_scale,
    CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.timer_coalesce_bg_shift, 0, "");
SYSCTL_PROC(_kern, OID_AUTO, timer_resort_threshold_ns,
    CTLTYPE_QUAD | CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.timer_resort_threshold_abstime,
    sizeof(tcoal_prio_params.timer_resort_threshold_abstime),
    sysctl_timer_user_us_kernel_abstime,
    "Q", "");
SYSCTL_PROC(_kern, OID_AUTO, timer_coalesce_bg_ns_max,
    CTLTYPE_QUAD | CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.timer_coalesce_bg_abstime_max,
    sizeof(tcoal_prio_params.timer_coalesce_bg_abstime_max),
    sysctl_timer_user_us_kernel_abstime,
    "Q", "");

SYSCTL_INT(_kern, OID_AUTO, timer_coalesce_kt_scale,
    CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.timer_coalesce_kt_shift, 0, "");

SYSCTL_PROC(_kern, OID_AUTO, timer_coalesce_kt_ns_max,
    CTLTYPE_QUAD | CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.timer_coalesce_kt_abstime_max,
    sizeof(tcoal_prio_params.timer_coalesce_kt_abstime_max),
    sysctl_timer_user_us_kernel_abstime,
    "Q", "");

SYSCTL_INT(_kern, OID_AUTO, timer_coalesce_fp_scale,
    CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.timer_coalesce_fp_shift, 0, "");

SYSCTL_PROC(_kern, OID_AUTO, timer_coalesce_fp_ns_max,
    CTLTYPE_QUAD | CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.timer_coalesce_fp_abstime_max,
    sizeof(tcoal_prio_params.timer_coalesce_fp_abstime_max),
    sysctl_timer_user_us_kernel_abstime,
    "Q", "");

SYSCTL_INT(_kern, OID_AUTO, timer_coalesce_ts_scale,
    CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.timer_coalesce_ts_shift, 0, "");

SYSCTL_PROC(_kern, OID_AUTO, timer_coalesce_ts_ns_max,
    CTLTYPE_QUAD | CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.timer_coalesce_ts_abstime_max,
    sizeof(tcoal_prio_params.timer_coalesce_ts_abstime_max),
    sysctl_timer_user_us_kernel_abstime,
    "Q", "");

SYSCTL_INT(_kern, OID_AUTO, timer_coalesce_tier0_scale,
    CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.latency_qos_scale[0], 0, "");

SYSCTL_PROC(_kern, OID_AUTO, timer_coalesce_tier0_ns_max,
    CTLTYPE_QUAD | CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.latency_qos_abstime_max[0],
    sizeof(tcoal_prio_params.latency_qos_abstime_max[0]),
    sysctl_timer_user_us_kernel_abstime,
    "Q", "");

SYSCTL_INT(_kern, OID_AUTO, timer_coalesce_tier1_scale,
    CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.latency_qos_scale[1], 0, "");

SYSCTL_PROC(_kern, OID_AUTO, timer_coalesce_tier1_ns_max,
    CTLTYPE_QUAD | CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.latency_qos_abstime_max[1],
    sizeof(tcoal_prio_params.latency_qos_abstime_max[1]),
    sysctl_timer_user_us_kernel_abstime,
    "Q", "");

SYSCTL_INT(_kern, OID_AUTO, timer_coalesce_tier2_scale,
    CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.latency_qos_scale[2], 0, "");

SYSCTL_PROC(_kern, OID_AUTO, timer_coalesce_tier2_ns_max,
    CTLTYPE_QUAD | CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.latency_qos_abstime_max[2],
    sizeof(tcoal_prio_params.latency_qos_abstime_max[2]),
    sysctl_timer_user_us_kernel_abstime,
    "Q", "");

SYSCTL_INT(_kern, OID_AUTO, timer_coalesce_tier3_scale,
    CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.latency_qos_scale[3], 0, "");

SYSCTL_PROC(_kern, OID_AUTO, timer_coalesce_tier3_ns_max,
    CTLTYPE_QUAD | CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.latency_qos_abstime_max[3],
    sizeof(tcoal_prio_params.latency_qos_abstime_max[3]),
    sysctl_timer_user_us_kernel_abstime,
    "Q", "");

SYSCTL_INT(_kern, OID_AUTO, timer_coalesce_tier4_scale,
    CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.latency_qos_scale[4], 0, "");

SYSCTL_PROC(_kern, OID_AUTO, timer_coalesce_tier4_ns_max,
    CTLTYPE_QUAD | CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.latency_qos_abstime_max[4],
    sizeof(tcoal_prio_params.latency_qos_abstime_max[4]),
    sysctl_timer_user_us_kernel_abstime,
    "Q", "");

SYSCTL_INT(_kern, OID_AUTO, timer_coalesce_tier5_scale,
    CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.latency_qos_scale[5], 0, "");

SYSCTL_PROC(_kern, OID_AUTO, timer_coalesce_tier5_ns_max,
    CTLTYPE_QUAD | CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.latency_qos_abstime_max[5],
    sizeof(tcoal_prio_params.latency_qos_abstime_max[5]),
    sysctl_timer_user_us_kernel_abstime,
    "Q", "");

/* Communicate the "user idle level" heuristic to the timer layer, and
 * potentially other layers in the future.
 */

static int
timer_user_idle_level(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
        int new_value = 0, old_value = 0, changed = 0, error;

        old_value = timer_get_user_idle_level();

        error = sysctl_io_number(req, old_value, sizeof(int), &new_value, &changed);

        if (error == 0 && changed) {
                if (timer_set_user_idle_level(new_value) != KERN_SUCCESS) {
                        error = ERANGE;
                }
        }

        return error;
}

SYSCTL_PROC(_machdep, OID_AUTO, user_idle_level,
    CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED,
    0, 0,
    timer_user_idle_level, "I", "User idle level heuristic, 0-128");

#if HYPERVISOR
SYSCTL_INT(_kern, OID_AUTO, hv_support,
    CTLFLAG_KERN | CTLFLAG_RD | CTLFLAG_LOCKED,
    &hv_support_available, 0, "");
#endif

#if CONFIG_EMBEDDED
STATIC int
sysctl_darkboot SYSCTL_HANDLER_ARGS
{
        int err = 0, value = 0;
#pragma unused(oidp, arg1, arg2, err, value, req)

        /*
         * Handle the sysctl request.
         *
         * If this is a read, the function will set the value to the current darkboot value. Otherwise,
         * we'll get the request identifier into "value" and then we can honor it.
         */
        if ((err = sysctl_io_number(req, darkboot, sizeof(int), &value, NULL)) != 0) {
                goto exit;
        }

        /* writing requested, let's process the request */
        if (req->newptr) {
                /* writing is protected by an entitlement */
                if (priv_check_cred(kauth_cred_get(), PRIV_DARKBOOT, 0) != 0) {
                        err = EPERM;
                        goto exit;
                }

                switch (value) {
                case MEMORY_MAINTENANCE_DARK_BOOT_UNSET:
                        /*
                         * If the darkboot sysctl is unset, the NVRAM variable
                         * must be unset too. If that's not the case, it means
                         * someone is doing something crazy and not supported.
                         */
                        if (darkboot != 0) {
                                int ret = PERemoveNVRAMProperty(MEMORY_MAINTENANCE_DARK_BOOT_NVRAM_NAME);
                                if (ret) {
                                        darkboot = 0;
                                } else {
                                        err = EINVAL;
                                }
                        }
                        break;
                case MEMORY_MAINTENANCE_DARK_BOOT_SET:
                        darkboot = 1;
                        break;
                case MEMORY_MAINTENANCE_DARK_BOOT_SET_PERSISTENT: {
                        /*
                         * Set the NVRAM and update 'darkboot' in case
                         * of success. Otherwise, do not update
                         * 'darkboot' and report the failure.
                         */
                        if (PEWriteNVRAMBooleanProperty(MEMORY_MAINTENANCE_DARK_BOOT_NVRAM_NAME, TRUE)) {
                                darkboot = 1;
                        } else {
                                err = EINVAL;
                        }

                        break;
                }
                default:
                        err = EINVAL;
                }
        }

exit:
        return err;
}

SYSCTL_PROC(_kern, OID_AUTO, darkboot,
    CTLFLAG_KERN | CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED | CTLFLAG_ANYBODY,
    0, 0, sysctl_darkboot, "I", "");
#endif

#if DEVELOPMENT || DEBUG
#include <sys/sysent.h>
/* This should result in a fatal exception, verifying that "sysent" is
 * write-protected.
 */
static int
kern_sysent_write(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
        uint64_t new_value = 0, old_value = 0;
        int changed = 0, error;

        error = sysctl_io_number(req, old_value, sizeof(uint64_t), &new_value, &changed);
        if ((error == 0) && changed) {
                volatile uint32_t *wraddr = (uint32_t *) &sysent[0];
                *wraddr = 0;
                printf("sysent[0] write succeeded\n");
        }
        return error;
}

SYSCTL_PROC(_kern, OID_AUTO, sysent_const_check,
    CTLTYPE_QUAD | CTLFLAG_RW | CTLFLAG_LOCKED,
    0, 0,
    kern_sysent_write, "I", "Attempt sysent[0] write");

#endif

#if DEVELOPMENT || DEBUG
SYSCTL_COMPAT_INT(_kern, OID_AUTO, development, CTLFLAG_RD | CTLFLAG_MASKED, NULL, 1, "");
#else
SYSCTL_COMPAT_INT(_kern, OID_AUTO, development, CTLFLAG_RD | CTLFLAG_MASKED, NULL, 0, "");
#endif


#if DEVELOPMENT || DEBUG

static int
sysctl_panic_test SYSCTL_HANDLER_ARGS
{
#pragma unused(arg1, arg2)
        int rval = 0;
        char str[32] = "entry prelog postlog postcore";

        rval = sysctl_handle_string(oidp, str, sizeof(str), req);

        if (rval == 0 && req->newptr) {
                if (strncmp("entry", str, strlen("entry")) == 0) {
                        panic_with_options(0, NULL, DEBUGGER_OPTION_RECURPANIC_ENTRY, "test recursive panic at entry");
                } else if (strncmp("prelog", str, strlen("prelog")) == 0) {
                        panic_with_options(0, NULL, DEBUGGER_OPTION_RECURPANIC_PRELOG, "test recursive panic prior to writing a paniclog");
                } else if (strncmp("postlog", str, strlen("postlog")) == 0) {
                        panic_with_options(0, NULL, DEBUGGER_OPTION_RECURPANIC_POSTLOG, "test recursive panic subsequent to paniclog");
                } else if (strncmp("postcore", str, strlen("postcore")) == 0) {
                        panic_with_options(0, NULL, DEBUGGER_OPTION_RECURPANIC_POSTCORE, "test recursive panic subsequent to on-device core");
                }
        }

        return rval;
}

static int
sysctl_debugger_test SYSCTL_HANDLER_ARGS
{
#pragma unused(arg1, arg2)
        int rval = 0;
        char str[32] = "entry prelog postlog postcore";

        rval = sysctl_handle_string(oidp, str, sizeof(str), req);

        if (rval == 0 && req->newptr) {
                if (strncmp("entry", str, strlen("entry")) == 0) {
                        DebuggerWithContext(0, NULL, "test recursive panic via debugger at entry", DEBUGGER_OPTION_RECURPANIC_ENTRY);
                } else if (strncmp("prelog", str, strlen("prelog")) == 0) {
                        DebuggerWithContext(0, NULL, "test recursive panic via debugger prior to writing a paniclog", DEBUGGER_OPTION_RECURPANIC_PRELOG);
                } else if (strncmp("postlog", str, strlen("postlog")) == 0) {
                        DebuggerWithContext(0, NULL, "test recursive panic via debugger subsequent to paniclog", DEBUGGER_OPTION_RECURPANIC_POSTLOG);
                } else if (strncmp("postcore", str, strlen("postcore")) == 0) {
                        DebuggerWithContext(0, NULL, "test recursive panic via debugger subsequent to on-device core", DEBUGGER_OPTION_RECURPANIC_POSTCORE);
                }
        }

        return rval;
}

decl_lck_spin_data(, spinlock_panic_test_lock)

__attribute__((noreturn))
static void
spinlock_panic_test_acquire_spinlock(void * arg __unused, wait_result_t wres __unused)
{
        lck_spin_lock(&spinlock_panic_test_lock);
        while (1) {
                ;
        }
}

static int
sysctl_spinlock_panic_test SYSCTL_HANDLER_ARGS
{
#pragma unused(oidp, arg1, arg2)
        if (req->newlen == 0) {
                return EINVAL;
        }

        thread_t panic_spinlock_thread;
        /* Initialize panic spinlock */
        lck_grp_t * panic_spinlock_grp;
        lck_grp_attr_t * panic_spinlock_grp_attr;
        lck_attr_t * panic_spinlock_attr;

        panic_spinlock_grp_attr = lck_grp_attr_alloc_init();
        panic_spinlock_grp = lck_grp_alloc_init("panic_spinlock", panic_spinlock_grp_attr);
        panic_spinlock_attr = lck_attr_alloc_init();

        lck_spin_init(&spinlock_panic_test_lock, panic_spinlock_grp, panic_spinlock_attr);


        /* Create thread to acquire spinlock */
        if (kernel_thread_start(spinlock_panic_test_acquire_spinlock, NULL, &panic_spinlock_thread) != KERN_SUCCESS) {
                return EBUSY;
        }

        /* Try to acquire spinlock -- should panic eventually */
        lck_spin_lock(&spinlock_panic_test_lock);
        while (1) {
                ;
        }
}

__attribute__((noreturn))
static void
simultaneous_panic_worker
(void * arg, wait_result_t wres __unused)
{
        atomic_int *start_panic = (atomic_int *)arg;

        while (!atomic_load(start_panic)) {
                ;
        }
        panic("SIMULTANEOUS PANIC TEST: INITIATING PANIC FROM CPU %d", cpu_number());
        __builtin_unreachable();
}

static int
sysctl_simultaneous_panic_test SYSCTL_HANDLER_ARGS
{
#pragma unused(oidp, arg1, arg2)
        if (req->newlen == 0) {
                return EINVAL;
        }

        int i = 0, threads_to_create = 2 * processor_count;
        atomic_int start_panic = 0;
        unsigned int threads_created = 0;
        thread_t new_panic_thread;

        for (i = threads_to_create; i > 0; i--) {
                if (kernel_thread_start(simultaneous_panic_worker, (void *) &start_panic, &new_panic_thread) == KERN_SUCCESS) {
                        threads_created++;
                }
        }

        /* FAIL if we couldn't create at least processor_count threads */
        if (threads_created < processor_count) {
                panic("SIMULTANEOUS PANIC TEST: FAILED TO CREATE ENOUGH THREADS, ONLY CREATED %d (of %d)",
                    threads_created, threads_to_create);
        }

        atomic_exchange(&start_panic, 1);
        while (1) {
                ;
        }
}

SYSCTL_PROC(_debug, OID_AUTO, panic_test, CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_MASKED, 0, 0, sysctl_panic_test, "A", "panic test");
SYSCTL_PROC(_debug, OID_AUTO, debugger_test, CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_MASKED, 0, 0, sysctl_debugger_test, "A", "debugger test");
SYSCTL_PROC(_debug, OID_AUTO, spinlock_panic_test, CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_MASKED, 0, 0, sysctl_spinlock_panic_test, "A", "spinlock panic test");
SYSCTL_PROC(_debug, OID_AUTO, simultaneous_panic_test, CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_MASKED, 0, 0, sysctl_simultaneous_panic_test, "A", "simultaneous panic test");

extern int exc_resource_threads_enabled;

SYSCTL_INT(_kern, OID_AUTO, exc_resource_threads_enabled, CTLFLAG_RD | CTLFLAG_LOCKED, &exc_resource_threads_enabled, 0, "exc_resource thread limit enabled");


#endif /* DEVELOPMENT || DEBUG */

const uint32_t thread_groups_supported = 0;

STATIC int
sysctl_thread_groups_supported(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
        int value = thread_groups_supported;
        return sysctl_io_number(req, value, sizeof(value), NULL, NULL);
}

SYSCTL_PROC(_kern, OID_AUTO, thread_groups_supported, CTLFLAG_RD | CTLFLAG_LOCKED | CTLFLAG_KERN,
    0, 0, &sysctl_thread_groups_supported, "I", "thread groups supported");

static int
sysctl_grade_cputype SYSCTL_HANDLER_ARGS
{
#pragma unused(arg1, arg2, oidp)
        int error = 0;
        int type_tuple[2] = {};
        int return_value = 0;

        error = SYSCTL_IN(req, &type_tuple, sizeof(type_tuple));

        if (error) {
                return error;
        }

        return_value = grade_binary(type_tuple[0], type_tuple[1]);

        error = SYSCTL_OUT(req, &return_value, sizeof(return_value));

        if (error) {
                return error;
        }

        return error;
}

SYSCTL_PROC(_kern, OID_AUTO, grade_cputype,
    CTLFLAG_RW | CTLFLAG_ANYBODY | CTLFLAG_MASKED | CTLFLAG_LOCKED | CTLTYPE_OPAQUE,
    0, 0, &sysctl_grade_cputype, "S",
    "grade value of cpu_type_t+cpu_sub_type_t");


#if DEVELOPMENT || DEBUG

static atomic_int wedge_thread_should_wake = 0;

static int
unwedge_thread SYSCTL_HANDLER_ARGS
{
#pragma unused(arg1, arg2)
        int error, val = 0;
        error = sysctl_handle_int(oidp, &val, 0, req);
        if (error || val == 0) {
                return error;
        }

        atomic_store(&wedge_thread_should_wake, 1);
        return 0;
}

SYSCTL_PROC(_kern, OID_AUTO, unwedge_thread, CTLFLAG_RW | CTLFLAG_ANYBODY | CTLFLAG_LOCKED, 0, 0, unwedge_thread, "I", "unwedge the thread wedged by kern.wedge_thread");

extern uintptr_t phys_carveout_pa;
SYSCTL_LONG(_kern, OID_AUTO, phys_carveout_pa, CTLFLAG_RD | CTLFLAG_LOCKED,
    &phys_carveout_pa,
    "base physical address of the phys_carveout_mb boot-arg region");
extern size_t phys_carveout_size;
SYSCTL_LONG(_kern, OID_AUTO, phys_carveout_size, CTLFLAG_RD | CTLFLAG_LOCKED,
    &phys_carveout_size,
    "size in bytes of the phys_carveout_mb boot-arg region");

static int
wedge_thread SYSCTL_HANDLER_ARGS
{
#pragma unused(arg1, arg2)

        int error, val = 0;
        error = sysctl_handle_int(oidp, &val, 0, req);
        if (error || val == 0) {
                return error;
        }

        uint64_t interval = 1;
        nanoseconds_to_absolutetime(1000 * 1000 * 50, &interval);

        atomic_store(&wedge_thread_should_wake, 0);
        while (!atomic_load(&wedge_thread_should_wake)) {
                tsleep1(NULL, 0, "wedge_thread", mach_absolute_time() + interval, NULL);
        }

        return 0;
}

SYSCTL_PROC(_kern, OID_AUTO, wedge_thread, CTLFLAG_RW | CTLFLAG_ANYBODY | CTLFLAG_LOCKED, 0, 0, wedge_thread, "I", "wedge this thread so it cannot be cleaned up");

static int
sysctl_turnstile_test_prim_lock SYSCTL_HANDLER_ARGS;
static int
sysctl_turnstile_test_prim_unlock SYSCTL_HANDLER_ARGS;
int
tstile_test_prim_lock(boolean_t use_hashtable);
int
tstile_test_prim_unlock(boolean_t use_hashtable);

#define SYSCTL_TURNSTILE_TEST_DEFAULT                   1
#define SYSCTL_TURNSTILE_TEST_GLOBAL_HASHTABLE          2

static int
sysctl_turnstile_test_prim_lock SYSCTL_HANDLER_ARGS
{
#pragma unused(arg1, arg2)
        int error, val = 0;
        error = sysctl_handle_int(oidp, &val, 0, req);
        if (error || val == 0) {
                return error;
        }
        boolean_t use_hashtable = (val == SYSCTL_TURNSTILE_TEST_GLOBAL_HASHTABLE) ? true : false;
        return tstile_test_prim_lock(use_hashtable);
}

static int
sysctl_turnstile_test_prim_unlock SYSCTL_HANDLER_ARGS
{
#pragma unused(arg1, arg2)
        int error, val = 0;
        error = sysctl_handle_int(oidp, &val, 0, req);
        if (error || val == 0) {
                return error;
        }
        boolean_t use_hashtable = (val == SYSCTL_TURNSTILE_TEST_GLOBAL_HASHTABLE) ? true : false;
        return tstile_test_prim_unlock(use_hashtable);
}

SYSCTL_PROC(_kern, OID_AUTO, turnstiles_test_lock, CTLFLAG_WR | CTLFLAG_ANYBODY | CTLFLAG_KERN | CTLFLAG_LOCKED,
    0, 0, sysctl_turnstile_test_prim_lock, "I", "turnstiles test lock");

SYSCTL_PROC(_kern, OID_AUTO, turnstiles_test_unlock, CTLFLAG_WR | CTLFLAG_ANYBODY | CTLFLAG_KERN | CTLFLAG_LOCKED,
    0, 0, sysctl_turnstile_test_prim_unlock, "I", "turnstiles test unlock");

int
turnstile_get_boost_stats_sysctl(void *req);
int
turnstile_get_unboost_stats_sysctl(void *req);
static int
sysctl_turnstile_boost_stats SYSCTL_HANDLER_ARGS;
static int
sysctl_turnstile_unboost_stats SYSCTL_HANDLER_ARGS;
extern uint64_t thread_block_on_turnstile_count;
extern uint64_t thread_block_on_regular_waitq_count;

static int
sysctl_turnstile_boost_stats SYSCTL_HANDLER_ARGS
{
#pragma unused(arg1, arg2, oidp)
        return turnstile_get_boost_stats_sysctl(req);
}

static int
sysctl_turnstile_unboost_stats SYSCTL_HANDLER_ARGS
{
#pragma unused(arg1, arg2, oidp)
        return turnstile_get_unboost_stats_sysctl(req);
}

SYSCTL_PROC(_kern, OID_AUTO, turnstile_boost_stats, CTLFLAG_RD | CTLFLAG_ANYBODY | CTLFLAG_KERN | CTLFLAG_LOCKED | CTLTYPE_STRUCT,
    0, 0, sysctl_turnstile_boost_stats, "S", "turnstiles boost stats");
SYSCTL_PROC(_kern, OID_AUTO, turnstile_unboost_stats, CTLFLAG_RD | CTLFLAG_ANYBODY | CTLFLAG_KERN | CTLFLAG_LOCKED | CTLTYPE_STRUCT,
    0, 0, sysctl_turnstile_unboost_stats, "S", "turnstiles unboost stats");
SYSCTL_QUAD(_kern, OID_AUTO, thread_block_count_on_turnstile,
    CTLFLAG_RD | CTLFLAG_ANYBODY | CTLFLAG_KERN | CTLFLAG_LOCKED,
    &thread_block_on_turnstile_count, "thread blocked on turnstile count");
SYSCTL_QUAD(_kern, OID_AUTO, thread_block_count_on_reg_waitq,
    CTLFLAG_RD | CTLFLAG_ANYBODY | CTLFLAG_KERN | CTLFLAG_LOCKED,
    &thread_block_on_regular_waitq_count, "thread blocked on regular waitq count");

static int
sysctl_lck_mtx_test_lock SYSCTL_HANDLER_ARGS
{
#pragma unused(arg1, arg2)
        int error, val = 0;
        error = sysctl_handle_int(oidp, &val, 0, req);
        if (error || val == 0) {
                return error;
        }

        if (val == 1) {
                lck_mtx_test_init();
                lck_mtx_test_lock();
        }

        return 0;
}

static int
sysctl_lck_mtx_test_unlock SYSCTL_HANDLER_ARGS
{
#pragma unused(arg1, arg2)
        int error, val = 0;
        error = sysctl_handle_int(oidp, &val, 0, req);
        if (error || val == 0) {
                return error;
        }

        if (val == 1) {
                lck_mtx_test_init();
                lck_mtx_test_unlock();
        }

        return 0;
}

static int
sysctl_erase_all_test_mtx_stats SYSCTL_HANDLER_ARGS
{
#pragma unused(arg1, arg2)
        int error, val = 0;
        error = sysctl_handle_int(oidp, &val, 0, req);
        if (error || val == 0) {
                return error;
        }

        if (val == 1) {
                lck_mtx_test_init();
                erase_all_test_mtx_stats();
        }

        return 0;
}

static int
sysctl_get_test_mtx_stats SYSCTL_HANDLER_ARGS
{
#pragma unused(oidp, arg1, arg2)
        char* buffer;
        int size, buffer_size, error;

        buffer_size = 1000;
        buffer = kalloc(buffer_size);
        if (!buffer) {
                panic("Impossible to allocate memory for %s\n", __func__);
        }

        lck_mtx_test_init();

        size = get_test_mtx_stats_string(buffer, buffer_size);

        error = sysctl_io_string(req, buffer, size, 0, NULL);

        kfree(buffer, buffer_size);

        return error;
}

static int
sysctl_test_mtx_uncontended SYSCTL_HANDLER_ARGS
{
#pragma unused(oidp, arg1, arg2)
        char* buffer;
        int buffer_size, offset, error, iter;
        char input_val[40];

        if (!req->newptr) {
                return 0;
        }

        if (!req->oldptr) {
                return EINVAL;
        }

        if (req->newlen >= sizeof(input_val)) {
                return EINVAL;
        }

        error = SYSCTL_IN(req, input_val, req->newlen);
        if (error) {
                return error;
        }
        input_val[req->newlen] = '\0';

        sscanf(input_val, "%d", &iter);

        if (iter <= 0) {
                printf("%s requested %d iterations, not starting the test\n", __func__, iter);
                return EINVAL;
        }

        lck_mtx_test_init();

        buffer_size = 2000;
        offset = 0;
        buffer = kalloc(buffer_size);
        if (!buffer) {
                panic("Impossible to allocate memory for %s\n", __func__);
        }
        memset(buffer, 0, buffer_size);

        printf("%s starting uncontended mutex test with %d iterations\n", __func__, iter);

        offset = snprintf(buffer, buffer_size, "STATS INNER LOOP");
        offset += lck_mtx_test_mtx_uncontended(iter, &buffer[offset], buffer_size - offset);

        offset += snprintf(&buffer[offset], buffer_size - offset, "\nSTATS OUTER LOOP");
        offset += lck_mtx_test_mtx_uncontended_loop_time(iter, &buffer[offset], buffer_size - offset);

        error = SYSCTL_OUT(req, buffer, offset);

        kfree(buffer, buffer_size);
        return error;
}

static int
sysctl_test_mtx_contended SYSCTL_HANDLER_ARGS
{
#pragma unused(oidp, arg1, arg2)
        char* buffer;
        int buffer_size, offset, error, iter;
        char input_val[40];

        printf("%s called\n", __func__);

        if (!req->newptr) {
                return 0;
        }

        if (!req->oldptr) {
                return EINVAL;
        }

        if (req->newlen >= sizeof(input_val)) {
                return EINVAL;
        }

        error = SYSCTL_IN(req, input_val, req->newlen);
        if (error) {
                return error;
        }
        input_val[req->newlen] = '\0';

        sscanf(input_val, "%d", &iter);

        if (iter <= 0) {
                printf("%s requested %d iterations, not starting the test\n", __func__, iter);
                return EINVAL;
        }

        lck_mtx_test_init();

        erase_all_test_mtx_stats();

        buffer_size = 1000;
        offset = 0;
        buffer = kalloc(buffer_size);
        if (!buffer) {
                panic("Impossible to allocate memory for %s\n", __func__);
        }
        memset(buffer, 0, buffer_size);

        printf("%s starting contended mutex test with %d iterations\n", __func__, iter);

        offset = snprintf(buffer, buffer_size, "STATS INNER LOOP");
        offset += lck_mtx_test_mtx_contended(iter, &buffer[offset], buffer_size - offset);

        printf("%s starting contended mutex loop test with %d iterations\n", __func__, iter);

        offset += snprintf(&buffer[offset], buffer_size - offset, "\nSTATS OUTER LOOP");
        offset += lck_mtx_test_mtx_contended_loop_time(iter, &buffer[offset], buffer_size - offset);

        error = SYSCTL_OUT(req, buffer, offset);

        kfree(buffer, buffer_size);

        return error;
}

SYSCTL_PROC(_kern, OID_AUTO, lck_mtx_test_lock, CTLFLAG_WR | CTLFLAG_MASKED | CTLFLAG_ANYBODY | CTLFLAG_KERN | CTLFLAG_LOCKED,
    0, 0, sysctl_lck_mtx_test_lock, "I", "lck mtx test lock");

SYSCTL_PROC(_kern, OID_AUTO, lck_mtx_test_unlock, CTLFLAG_WR | CTLFLAG_MASKED | CTLFLAG_ANYBODY | CTLFLAG_KERN | CTLFLAG_LOCKED,
    0, 0, sysctl_lck_mtx_test_unlock, "I", "lck mtx test unlock");

SYSCTL_PROC(_kern, OID_AUTO, erase_all_test_mtx_stats, CTLFLAG_WR | CTLFLAG_MASKED | CTLFLAG_ANYBODY | CTLFLAG_KERN | CTLFLAG_LOCKED,
    0, 0, sysctl_erase_all_test_mtx_stats, "I", "erase test_mtx statistics");

SYSCTL_PROC(_kern, OID_AUTO, get_test_mtx_stats, CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MASKED | CTLFLAG_KERN | CTLFLAG_LOCKED,
    0, 0, sysctl_get_test_mtx_stats, "A", "get test_mtx statistics");

SYSCTL_PROC(_kern, OID_AUTO, test_mtx_contended, CTLTYPE_STRING | CTLFLAG_MASKED | CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_LOCKED,
    0, 0, sysctl_test_mtx_contended, "A", "get statistics for contended mtx test");

SYSCTL_PROC(_kern, OID_AUTO, test_mtx_uncontended, CTLTYPE_STRING | CTLFLAG_MASKED | CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_LOCKED,
    0, 0, sysctl_test_mtx_uncontended, "A", "get statistics for uncontended mtx test");

extern uint64_t MutexSpin;

SYSCTL_QUAD(_kern, OID_AUTO, mutex_spin_us, CTLFLAG_RW, &MutexSpin,
    "Spin time for acquiring a kernel mutex");

#if defined (__x86_64__)

semaphore_t sysctl_test_panic_with_thread_sem;

#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Winfinite-recursion" /* rdar://38801963 */
__attribute__((noreturn))
static void
panic_thread_test_child_spin(void * arg, wait_result_t wres)
{
        static int panic_thread_recurse_count = 5;

        if (panic_thread_recurse_count > 0) {
                panic_thread_recurse_count--;
                panic_thread_test_child_spin(arg, wres);
        }

        semaphore_signal(sysctl_test_panic_with_thread_sem);
        while (1) {
                ;
        }
}
#pragma clang diagnostic pop

static void
panic_thread_test_child_park(void * arg __unused, wait_result_t wres __unused)
{
        int event;

        assert_wait(&event, THREAD_UNINT);
        semaphore_signal(sysctl_test_panic_with_thread_sem);
        thread_block(panic_thread_test_child_park);
}

static int
sysctl_test_panic_with_thread SYSCTL_HANDLER_ARGS
{
#pragma unused(arg1, arg2)
        int rval = 0;
        char str[16] = { '\0' };
        thread_t child_thread = THREAD_NULL;

        rval = sysctl_handle_string(oidp, str, sizeof(str), req);
        if (rval != 0 || !req->newptr) {
                return EINVAL;
        }

        semaphore_create(kernel_task, &sysctl_test_panic_with_thread_sem, SYNC_POLICY_FIFO, 0);

        /* Create thread to spin or park in continuation */
        if (strncmp("spin", str, strlen("spin")) == 0) {
                if (kernel_thread_start(panic_thread_test_child_spin, NULL, &child_thread) != KERN_SUCCESS) {
                        semaphore_destroy(kernel_task, sysctl_test_panic_with_thread_sem);
                        return EBUSY;
                }
        } else if (strncmp("continuation", str, strlen("continuation")) == 0) {
                if (kernel_thread_start(panic_thread_test_child_park, NULL, &child_thread) != KERN_SUCCESS) {
                        semaphore_destroy(kernel_task, sysctl_test_panic_with_thread_sem);
                        return EBUSY;
                }
        } else {
                semaphore_destroy(kernel_task, sysctl_test_panic_with_thread_sem);
                return EINVAL;
        }

        semaphore_wait(sysctl_test_panic_with_thread_sem);

        panic_with_thread_context(0, NULL, 0, child_thread, "testing panic_with_thread_context for thread %p", child_thread);

        /* Not reached */
        return EINVAL;
}

SYSCTL_PROC(_kern, OID_AUTO, test_panic_with_thread, CTLFLAG_MASKED | CTLFLAG_KERN | CTLFLAG_LOCKED | CTLFLAG_WR | CTLTYPE_STRING,
    0, 0, sysctl_test_panic_with_thread, "A", "test panic flow for backtracing a different thread");
#endif /* defined (__x86_64__) */
#endif /* DEVELOPMENT || DEBUG */