gems-kernel/source/THIRDPARTY/xnu/bsd/sys/user.h
2024-06-03 11:29:39 -05:00

423 lines
16 KiB
C

/*
* Copyright (c) 2000-2018 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, 1997 Apple Computer, Inc. All Rights Reserved */
/*
* Copyright (c) 1982, 1986, 1989, 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* 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.
*
* @(#)user.h 8.2 (Berkeley) 9/23/93
*/
#ifndef _SYS_USER_H_
#define _SYS_USER_H_
#include <sys/appleapiopts.h>
struct waitq_set;
#ifndef KERNEL
/* stuff that *used* to be included by user.h, or is now needed */
#include <errno.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/ucred.h>
#include <sys/uio.h>
#endif
#ifdef XNU_KERNEL_PRIVATE
#include <sys/resource.h>
#include <sys/resourcevar.h>
#include <sys/signal.h>
#include <sys/signalvar.h>
#endif
#include <sys/vm.h> /* XXX */
#include <sys/sysctl.h>
#ifdef KERNEL
#ifdef BSD_KERNEL_PRIVATE
#include <sys/pthread_internal.h> /* for uu_kwe entry */
#include <sys/eventvar.h>
#include <kern/btlog.h>
#endif /* BSD_KERNEL_PRIVATE */
#ifdef __APPLE_API_PRIVATE
#include <sys/eventvar.h>
#if !defined(__LP64__) || defined(XNU_KERNEL_PRIVATE)
/*
* VFS context structure (part of uthread)
*/
struct vfs_context {
thread_t vc_thread; /* pointer to Mach thread */
kauth_cred_t vc_ucred; /* per thread credential */
};
#endif /* !__LP64 || XNU_KERNEL_PRIVATE */
#ifdef BSD_KERNEL_PRIVATE
struct label; /* MAC label dummy struct */
#define MAXTHREADNAMESIZE 64
/*
* Per-thread U area.
*/
#if PROC_REF_DEBUG
struct uthread_proc_ref_info {
#define NUM_PROC_REFS_TO_TRACK 31
uint32_t upri_pindex;
btref_t upri_proc_stacks[NUM_PROC_REFS_TO_TRACK];
void * upri_proc_ps[NUM_PROC_REFS_TO_TRACK];
};
#endif /* PROC_REF_DEBUG */
struct uthread {
/* syscall parameters, results and catches */
u_int64_t uu_arg[8]; /* arguments to current system call */
int uu_rval[2];
char uu_cursig; /* p_cursig for exc. */
/*
* uu_workq_pthread_kill_allowed is not modified under a lock and thus
* relies on single copy atomicity and cannot be changed to a bitfield.
*/
bool uu_workq_pthread_kill_allowed;
uint16_t syscall_code; /* current syscall code */
/* thread exception handling */
int uu_exception;
mach_exception_code_t uu_code; /* ``code'' to trap */
mach_exception_subcode_t uu_subcode;
/* support for syscalls which use continuations */
union {
struct _select_data {
u_int64_t abstime;
int count;
struct select_nocancel_args *args; /* original syscall arguments */
int32_t *retval; /* place to store return val */
} uus_select_data;
struct kevent_ctx_s uus_kevent;
struct _kevent_register {
struct kevent_qos_s kev; /* the kevent to maybe copy out */
thread_t handoff_thread; /* thread we handed off to, has +1 */
struct kqworkloop *kqwl;
int eventout; /* number of events output */
user_addr_t ueventlist; /* the user-address to copyout to */
} uus_kevent_register; /* saved for EVFILT_WORKLOOP wait */
struct _kauth {
user_addr_t message; /* message in progress */
} uus_kauth;
struct ksyn_waitq_element uus_kwe; /* user for pthread synch */
struct _waitid_data {
struct waitid_nocancel_args *args; /* original syscall arguments */
int32_t *retval; /* place to store return val */
} uus_waitid_data;
struct _wait4_data {
struct wait4_nocancel_args *args; /* original syscall arguments */
int32_t *retval; /* place to store return val */
} uus_wait4_data;
struct _workq_park_data {
uint64_t idle_stamp;
uint64_t workloop_params;
uint32_t fulfilled_snapshot;
uint32_t yields;
void *thread_request; /* request being fulfilled, for tracing only */
uint32_t upcall_flags;
bool has_stack;
thread_qos_t qos;
} uus_workq_park_data; /* saved for parked workq threads */
struct _ulock_wait_data {
struct ull *ull;
thread_t owner_thread;
thread_t old_owner;
int32_t *retval;
uint flags;
} uus_ulock_wait_data;
struct _bsdthread_terminate {
user_addr_t ulock_addr;
mach_port_name_t kport;
} uus_bsdthread_terminate;
struct _exec_data {
struct image_params *imgp;
} uus_exec_data;
} uu_save;
/* Persistent memory allocations across system calls */
struct _select {
u_int32_t *ibits, *obits; /* bits to select on */
uint nbytes; /* number of bytes in ibits and obits */
} uu_select; /* saved state for select() */
void * uu_userstate;
struct select_set *uu_selset; /* waitq state cached across select calls */
int uu_flag;
sigset_t uu_siglist; /* signals pending for the thread */
sigset_t uu_sigwait; /* sigwait on this thread*/
sigset_t uu_sigmask; /* signal mask for the thread */
sigset_t uu_oldmask; /* signal mask saved before sigpause */
user_addr_t uu_sigreturn_token; /* random token used to validate sigreturn arguments */
uint32_t uu_sigreturn_diversifier; /* random diversifier used to validate user signed sigreturn pc/lr */
int uu_pending_sigreturn; /* Pending sigreturn count */
TAILQ_ENTRY(uthread) uu_list; /* List of uthreads in proc */
#if CONFIG_AUDIT
struct kaudit_record *uu_ar; /* audit record */
#endif
struct task *uu_aio_task; /* target task for async io */
union {
lck_mtx_t *uu_mtx;
struct knote_lock_ctx *uu_knlock;
};
lck_spin_t uu_rethrottle_lock; /* locks was_rethrottled and is_throttled */
TAILQ_ENTRY(uthread) uu_throttlelist; /* List of uthreads currently throttled */
void * uu_throttle_info; /* pointer to throttled I/Os info */
int8_t uu_on_throttlelist;
bool uu_lowpri_window;
/* These boolean fields are protected by different locks */
bool uu_was_rethrottled;
bool uu_is_throttled;
bool uu_throttle_bc;
bool uu_defer_reclaims;
/* internal support for continuation framework */
uint16_t uu_pri; /* pri | PCATCH | PVFS, ... */
caddr_t uu_wchan; /* sleeping thread wait channel */
int (*uu_continuation)(int);
const char *uu_wmesg; /* ... wait message */
struct kern_sigaltstack uu_sigstk;
vnode_t uu_vreclaims;
vnode_t uu_cdir; /* per thread CWD */
int uu_dupfd; /* fd in fdesc_open/dupfdopen */
u_int32_t uu_network_marks; /* network control flow marks */
/*
* Bound kqueue request. This field is only cleared by the current thread,
* hence can be dereferenced safely by the current thread without locks.
*/
struct workq_threadreq_s *uu_kqr_bound;
TAILQ_ENTRY(uthread) uu_workq_entry;
vm_offset_t uu_workq_stackaddr;
mach_port_name_t uu_workq_thport;
struct uu_workq_policy {
/* Requested QoS.
*
* - Modified on self during qos updates, or on idle threads we are setting
* up to run (eg. creator, threads for dispatch apply, etc) while holding
* wq lock
* - Read from self
*
* Synchronization is subtle since it's generally on self but when
* modifying on non-self threads, we rely on the fact that they are
* previously idle and therefore, not modifying it on self at the same time
* until they take the wq lock.
*/
uint16_t qos_req : 4;
/* Current acked max qos - from kevent.
*
* Synchronized by being modified on self. Also generally under the wq lock
* but that's more of a happy coincidence.
*/
uint16_t qos_max : 4;
/* Async QoS override received - workqueue override
*
* Synchronized with the thread mutex and wq lock since it can be modified
* by another thread.
*/
uint16_t qos_override : 4;
/* Current acked bucket.
*
* Synchronized by only being read or written on self.
*/
uint16_t qos_bucket : 4;
} uu_workq_pri;
uint16_t uu_workq_flags;
kq_index_t uu_kqueue_override;
#ifdef CONFIG_IOCOUNT_TRACE
int uu_iocount;
int uu_vpindex;
void *uu_vps[32];
void *uu_pcs[32][10];
#endif
#if CONFIG_WORKLOOP_DEBUG
#define UU_KEVENT_HISTORY_COUNT 32
#define UU_KEVENT_HISTORY_WRITE_ENTRY(uth, ...) ({ \
struct uthread *__uth = (uth); \
unsigned int __index = __uth->uu_kevent_index++; \
__uth->uu_kevent_history[__index % UU_KEVENT_HISTORY_COUNT] = \
(struct uu_kevent_history)__VA_ARGS__; \
})
struct uu_kevent_history {
uint64_t uu_kqid;
struct kqueue *uu_kq;
int uu_error, uu_nchanges, uu_nevents;
unsigned int uu_flags;
} uu_kevent_history[UU_KEVENT_HISTORY_COUNT];
unsigned int uu_kevent_index;
#endif
int uu_proc_refcount;
#if PROC_REF_DEBUG
struct uthread_proc_ref_info *uu_proc_ref_info;
#endif
#if CONFIG_DTRACE
uint32_t t_dtrace_errno; /* Most recent errno */
siginfo_t t_dtrace_siginfo;
uint64_t t_dtrace_resumepid; /* DTrace's pidresume() pid */
uint8_t t_dtrace_stop; /* indicates a DTrace desired stop */
uint8_t t_dtrace_sig; /* signal sent via DTrace's raise() */
union __tdu {
struct __tds {
uint8_t _t_dtrace_on; /* hit a fasttrap tracepoint */
uint8_t _t_dtrace_step; /* about to return to kernel */
uint8_t _t_dtrace_ret; /* handling a return probe */
uint8_t _t_dtrace_ast; /* saved ast flag */
#if __sol64 || defined(__APPLE__)
uint8_t _t_dtrace_reg; /* modified register */
#endif
} _tds;
u_int32_t _t_dtrace_ft; /* bitwise or of these flags */
} _tdu;
#define t_dtrace_ft _tdu._t_dtrace_ft
#define t_dtrace_on _tdu._tds._t_dtrace_on
#define t_dtrace_step _tdu._tds._t_dtrace_step
#define t_dtrace_ret _tdu._tds._t_dtrace_ret
#define t_dtrace_ast _tdu._tds._t_dtrace_ast
#if __sol64 || defined(__APPLE__)
#define t_dtrace_reg _tdu._tds._t_dtrace_reg
#endif
user_addr_t t_dtrace_pc; /* DTrace saved pc from fasttrap */
user_addr_t t_dtrace_npc; /* DTrace next pc from fasttrap */
user_addr_t t_dtrace_scrpc; /* DTrace per-thread scratch location */
user_addr_t t_dtrace_astpc; /* DTrace return sequence location */
struct dtrace_ptss_page_entry* t_dtrace_scratch; /* scratch space entry */
#if __sol64 || defined(__APPLE__)
uint64_t t_dtrace_regv; /* DTrace saved reg from fasttrap */
#endif
void *t_dtrace_syscall_args;
#endif /* CONFIG_DTRACE */
char *pth_name;
/* Document Tracking struct used to track a "tombstone" for a document */
struct doc_tombstone *t_tombstone;
/* Field to be used by filesystems */
uint64_t t_fs_private;
struct os_reason *uu_exit_reason;
#if CONFIG_DEBUG_SYSCALL_REJECTION
uint64_t syscall_rejection_flags; /* flags for syscall rejection behavior */
uint64_t *syscall_rejection_mask; /* mach_trap_count + nsysent bits */
uint64_t *syscall_rejection_once_mask; /* mach_trap_count + nsysent bits */
#endif /* CONFIG_DEBUG_SYSCALL_REJECTION */
};
typedef struct uthread * uthread_t;
/* Definition of uu_flag */
#define UT_SAS_OLDMASK 0x00000001 /* need to restore mask before pause */
#define UT_NO_SIGMASK 0x00000002 /* exited thread; invalid sigmask */
#define UT_NOTCANCELPT 0x00000004 /* not a cancelation point */
#define UT_CANCEL 0x00000008 /* thread marked for cancel */
#define UT_CANCELED 0x00000010 /* thread cancelled */
#define UT_CANCELDISABLE 0x00000020 /* thread cancel disabled */
#define UT_ALTSTACK 0x00000040 /* this thread has alt stack for signals */
#define UT_THROTTLE_IO 0x00000080 /* this thread issues throttle I/O */
#define UT_PASSIVE_IO 0x00000100 /* this thread issues passive I/O */
#define UT_PROCEXIT 0x00000200 /* this thread completed the proc exit */
#define UT_RAGE_VNODES 0x00000400 /* rapid age any vnodes created by this thread */
#define UT_KERN_RAGE_VNODES 0x00000800 /* rapid age any vnodes created by this thread (kernel set) */
#define UT_NSPACE_NODATALESSFAULTS 0x00001000 /* thread does not materialize dataless files */
#define UT_ATIME_UPDATE 0x00002000 /* don't update atime for files accessed by this thread */
#define UT_NSPACE_FORCEDATALESSFAULTS 0x00004000 /* thread always materializes dataless files */
#define UT_LP64 0x00010000 /* denormalized P_LP64 bit from proc */
#define UT_FS_BLKSIZE_NOCACHE_WRITES 0x00020000 /* thread wants sub pagesize directIO writes */
#endif /* BSD_KERNEL_PRIVATE */
#endif /* __APPLE_API_PRIVATE */
#endif /* KERNEL */
/*
* Per process structure containing data that isn't needed in core
* when the process isn't running (esp. when swapped out).
* This structure may or may not be at the same kernel address
* in all processes.
*/
struct user {
/* NOT USED ANYMORE */
};
#endif /* !_SYS_USER_H_ */