[apple/xnu.git] / bsd / sys / proc_internal.h

/*
 * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This 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 OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/* Copyright (c) 1995, 1997 Apple Computer, Inc. All Rights Reserved */
/*-
 * Copyright (c) 1986, 1989, 1991, 1993
 *	The Regents of the University of California.  All rights reserved.
 * (c) UNIX System Laboratories, Inc.
 * All or some portions of this file are derived from material licensed
 * to the University of California by American Telephone and Telegraph
 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
 * the permission of UNIX System Laboratories, 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.
 *
 *	@(#)proc_internal.h	8.15 (Berkeley) 5/19/95
 */

#ifndef _SYS_PROC_INTERNAL_H_
#define	_SYS_PROC_INTERNAL_H_

#include <sys/proc.h>
__BEGIN_DECLS
#include <kern/locks.h>
__END_DECLS

/*
 * One structure allocated per session.
 */
struct	session {
	int	s_count;		/* Ref cnt; pgrps in session. */
	struct	proc *s_leader;		/* Session leader. */
	struct	vnode *s_ttyvp;		/* Vnode of controlling terminal. */
	struct	tty *s_ttyp;		/* Controlling terminal. */
	pid_t	s_sid;		/* Session ID */
	char	s_login[MAXLOGNAME];	/* Setlogin() name. */
};

/*
 * One structure allocated per process group.
 */
struct	pgrp {
	LIST_ENTRY(pgrp) pg_hash;	/* Hash chain. */
	LIST_HEAD(, proc) pg_members;	/* Pointer to pgrp members. */
	struct	session *pg_session;	/* Pointer to session. */
	pid_t	pg_id;			/* Pgrp id. */
	int	pg_jobc;	/* # procs qualifying pgrp for job control */
};

struct proc;

#define PROC_NULL (struct proc *)0;

#define	p_session	p_pgrp->pg_session
#define	p_pgid		p_pgrp->pg_id

/*
 * Description of a process.
 *
 * This structure contains the information needed to manage a thread of
 * control, known in UN*X as a process; it has references to substructures
 * containing descriptions of things that the process uses, but may share
 * with related processes.  The process structure and the substructures
 * are always addressible except for those marked "(PROC ONLY)" below,
 * which might be addressible only on a processor on which the process
 * is running.
 */
struct	proc {
	LIST_ENTRY(proc) p_list;	/* List of all processes. */

	/* substructures: */
	struct	ucred *p_ucred;		/* Process owner's identity. */
	struct	filedesc *p_fd;		/* Ptr to open files structure. */
	struct	pstats *p_stats;	/* Accounting/statistics (PROC ONLY). */
	struct	plimit *p_limit;	/* Process limits. */
	struct	sigacts *p_sigacts;	/* Signal actions, state (PROC ONLY). */

#define	p_rlimit	p_limit->pl_rlimit

	int	p_flag;			/* P_* flags. */
	char	p_stat;			/* S* process status. */
	char	p_shutdownstate;
	char	p_pad1[2];

	pid_t	p_pid;			/* Process identifier. */
	LIST_ENTRY(proc) p_pglist;	/* List of processes in pgrp. */
	struct	proc *p_pptr;	 	/* Pointer to parent process. */
	LIST_ENTRY(proc) p_sibling;	/* List of sibling processes. */
	LIST_HEAD(, proc) p_children;	/* Pointer to list of children. */

/* The following fields are all zeroed upon creation in fork. */
#define	p_startzero	p_oppid

	pid_t	p_oppid;	 /* Save parent pid during ptrace. XXX */
	int	p_dupfd;	 /* Sideways return value from fdopen. XXX */

	/* scheduling */
	u_int	p_estcpu;	 /* Time averaged value of p_cpticks. */
	int	p_cpticks;	 /* Ticks of cpu time. */
	fixpt_t	p_pctcpu;	 /* %cpu for this process during p_swtime */
	void	*p_wchan;	 /* Sleep address. */
	char	*p_wmesg;	 /* Reason for sleep. */
	u_int	p_swtime;	 /* DEPRECATED (Time swapped in or out.) */
#define	p_argslen p_swtime	 /* Length of process arguments. */
	u_int	p_slptime;	 /* Time since last blocked. */

	struct	itimerval p_realtimer;	/* Alarm timer. */
	struct	timeval p_rtime;	/* Real time. */
	u_quad_t p_uticks;		/* Statclock hits in user mode. */
	u_quad_t p_sticks;		/* Statclock hits in system mode. */
	u_quad_t p_iticks;		/* Statclock hits processing intr. */

	int	p_traceflag;		/* Kernel trace points. */
	struct	vnode *p_tracep;	/* Trace to vnode. */

	sigset_t p_siglist;		/* DEPRECATED. */

	struct	vnode *p_textvp;	/* Vnode of executable. */

/* End area that is zeroed on creation. */
#define	p_endzero	p_hash.le_next

	/*
	 * Not copied, not zero'ed.
	 * Belongs after p_pid, but here to avoid shifting proc elements.
	 */
	LIST_ENTRY(proc) p_hash;	/* Hash chain. */
	TAILQ_HEAD( ,eventqelt) p_evlist;

/* The following fields are all copied upon creation in fork. */
#define	p_startcopy	p_sigmask

	sigset_t p_sigmask;		/* DEPRECATED */
	sigset_t p_sigignore;	/* Signals being ignored. */
	sigset_t p_sigcatch;	/* Signals being caught by user. */

	u_char	p_priority;	/* Process priority. */
	u_char	p_usrpri;	/* User-priority based on p_cpu and p_nice. */
	char	p_nice;		/* Process "nice" value. */
	char	p_comm[MAXCOMLEN+1];

	struct 	pgrp *p_pgrp;	/* Pointer to process group. */

/* End area that is copied on creation. */
#define	p_endcopy	p_xstat
	
	u_short	p_xstat;	/* Exit status for wait; also stop signal. */
	u_short	p_acflag;	/* Accounting flags. */
	struct	rusage *p_ru;	/* Exit information. XXX */

	int	p_debugger;	/* 1: can exec set-bit programs if suser */

	void	*task;			/* corresponding task */
	void	*sigwait_thread;	/* 'thread' holding sigwait */
	char 	signal_lock[72];
	boolean_t	 sigwait;	/* indication to suspend */
	void	*exit_thread;		/* Which thread is exiting? */
	user_addr_t user_stack;		/* where user stack was allocated */
	void * exitarg;			/* exit arg for proc terminate */
	void * vm_shm;			/* for sysV shared memory */
	int  p_argc;			/* saved argc for sysctl_procargs() */
	int		p_vforkcnt;		/* number of outstanding vforks */
    void *  p_vforkact;     /* activation running this vfork proc */
	TAILQ_HEAD( , uthread) p_uthlist; /* List of uthreads  */
	/* Following fields are info from SIGCHLD */
	pid_t	si_pid;
	u_short si_status;
	u_short	si_code;
	uid_t	si_uid;
	TAILQ_HEAD( , aio_workq_entry ) aio_activeq; /* active async IO requests */
	int		aio_active_count;	/* entries on aio_activeq */
	TAILQ_HEAD( , aio_workq_entry ) aio_doneq;	 /* completed async IO requests */
	int		aio_done_count;		/* entries on aio_doneq */

	struct klist p_klist;  /* knote list */
	lck_mtx_t	p_mlock;	/* proc lock to protect evques */
	lck_mtx_t	p_fdmlock;	/* proc lock to protect evques */
	unsigned int p_fdlock_pc[4];
	unsigned int p_fdunlock_pc[4];
	int		p_fpdrainwait;
	int		p_lflag;		/* local flags */
#if DIAGNOSTIC
#if SIGNAL_DEBUG
	unsigned int lockpc[8];
	unsigned int unlockpc[8];
#endif /* SIGNAL_DEBUG */
#endif /* DIAGNOSTIC */
};


#define	P_LDELAYTERM		0x1	/* */
#define	P_LNOZOMB		0x2	/* */
#define P_LLOW_PRI_IO		0x4
#define P_LPEXIT		0x8
#define P_LBACKGROUND_IO	0x10

// LP64todo - should this move?
/* LP64 version of extern_proc.  all pointers 
 * grow when we're dealing with a 64-bit process.
 * WARNING - keep in sync with extern_proc
 * but use native alignment of 64-bit process.
 */

#ifdef KERNEL
#include <sys/time.h>	/* user_timeval, user_itimerval */

#if __DARWIN_ALIGN_NATURAL
#pragma options align=natural
#endif

struct user_extern_proc {
	union {
		struct {
			user_addr_t __p_forw;	/* Doubly-linked run/sleep queue. */
			user_addr_t __p_back;
		} p_st1;
		struct user_timeval __p_starttime; 	/* process start time */
	} p_un;
	user_addr_t 	p_vmspace;	/* Address space. */
	user_addr_t		p_sigacts;	/* Signal actions, state (PROC ONLY). */
	int		p_flag;			/* P_* flags. */
	char	p_stat;			/* S* process status. */
	pid_t	p_pid;			/* Process identifier. */
	pid_t	p_oppid;		/* Save parent pid during ptrace. XXX */
	int		p_dupfd;		/* Sideways return value from fdopen. XXX */
	/* Mach related  */
	user_addr_t user_stack;	/* where user stack was allocated */
	user_addr_t exit_thread;  /* XXX Which thread is exiting? */
	int		p_debugger;		/* allow to debug */
	boolean_t	sigwait;	/* indication to suspend */
	/* scheduling */
	u_int	p_estcpu;	 /* Time averaged value of p_cpticks. */
	int		p_cpticks;	 /* Ticks of cpu time. */
	fixpt_t	p_pctcpu;	 /* %cpu for this process during p_swtime */
	user_addr_t	p_wchan;	 /* Sleep address. */
	user_addr_t	p_wmesg;	 /* Reason for sleep. */
	u_int	p_swtime;	 /* Time swapped in or out. */
	u_int	p_slptime;	 /* Time since last blocked. */
	struct	user_itimerval p_realtimer;	/* Alarm timer. */
	struct	user_timeval p_rtime;	/* Real time. */
	u_quad_t p_uticks;		/* Statclock hits in user mode. */
	u_quad_t p_sticks;		/* Statclock hits in system mode. */
	u_quad_t p_iticks;		/* Statclock hits processing intr. */
	int		p_traceflag;		/* Kernel trace points. */
	user_addr_t	p_tracep;	/* Trace to vnode. */
	int		p_siglist;		/* DEPRECATED */
	user_addr_t	p_textvp;	/* Vnode of executable. */
	int		p_holdcnt;		/* If non-zero, don't swap. */
	sigset_t p_sigmask;	/* DEPRECATED. */
	sigset_t p_sigignore;	/* Signals being ignored. */
	sigset_t p_sigcatch;	/* Signals being caught by user. */
	u_char	p_priority;	/* Process priority. */
	u_char	p_usrpri;	/* User-priority based on p_cpu and p_nice. */
	char	p_nice;		/* Process "nice" value. */
	char	p_comm[MAXCOMLEN+1];
	user_addr_t	p_pgrp;	/* Pointer to process group. */
	user_addr_t	p_addr;	/* Kernel virtual addr of u-area (PROC ONLY). */
	u_short	p_xstat;	/* Exit status for wait; also stop signal. */
	u_short	p_acflag;	/* Accounting flags. */
	user_addr_t	p_ru;	/* Exit information. XXX */
};

#if __DARWIN_ALIGN_NATURAL
#pragma options align=reset
#endif
#endif	/* KERNEL */

/*
 * We use process IDs <= PID_MAX; PID_MAX + 1 must also fit in a pid_t,
 * as it is used to represent "no process group".
 */
extern int nprocs, maxproc;		/* Current and max number of procs. */
__private_extern__ int hard_maxproc;	/* hard limit */

#define	PID_MAX		30000
#define	NO_PID		30001

#define SESS_LEADER(p)	((p)->p_session->s_leader == (p))
#define	SESSHOLD(s)	((s)->s_count++)
#define	SESSRELE(s)	sessrele(s)

#define	PIDHASH(pid)	(&pidhashtbl[(pid) & pidhash])
extern LIST_HEAD(pidhashhead, proc) *pidhashtbl;
extern u_long pidhash;

#define	PGRPHASH(pgid)	(&pgrphashtbl[(pgid) & pgrphash])
extern LIST_HEAD(pgrphashhead, pgrp) *pgrphashtbl;
extern u_long pgrphash;
extern lck_grp_t * proc_lck_grp;
extern lck_grp_attr_t * proc_lck_grp_attr;
extern lck_attr_t * proc_lck_attr;

LIST_HEAD(proclist, proc);
extern struct proclist allproc;		/* List of all processes. */
extern struct proclist zombproc;	/* List of zombie processes. */
extern struct proc *initproc;
extern void	pgdelete(struct pgrp *pgrp);
extern void	sessrele(struct session *sess);
extern void	procinit(void);
extern void proc_lock(struct proc *);
extern void proc_unlock(struct proc *);
extern void proc_fdlock(struct proc *);
extern void proc_fdunlock(struct proc *);
__private_extern__ char *proc_core_name(const char *name, uid_t uid, pid_t pid);
extern int isinferior(struct proc *, struct proc *);
extern struct	proc *pfind(pid_t);	/* Find process by id. */
__private_extern__ struct proc *pzfind(pid_t);	/* Find zombie by id. */
extern struct	pgrp *pgfind(pid_t);	/* Find process group by id. */

extern int	chgproccnt(uid_t uid, int diff);
extern int	enterpgrp(struct proc *p, pid_t pgid, int mksess);
extern void	fixjobc(struct proc *p, struct pgrp *pgrp, int entering);
extern int	inferior(struct proc *p);
extern int	leavepgrp(struct proc *p);
extern void	resetpriority(struct proc *);
extern void	setrunnable(struct proc *);
extern void	setrunqueue(struct proc *);
extern int	sleep(void *chan, int pri);
extern int	tsleep0(void *chan, int pri, const char *wmesg, int timo, int (*continuation)(int));
extern int	tsleep1(void *chan, int pri, const char *wmesg, u_int64_t abstime, int (*continuation)(int));
extern int	msleep0(void *chan, lck_mtx_t *mtx, int pri, const char *wmesg, int timo, int (*continuation)(int));
extern void	vfork_return(thread_t th_act, struct proc *p, struct proc *p2, register_t *retval);


#endif	/* !_SYS_PROC_INTERNAL_H_ */
Commit	Line	Data
91447636 A	1	/*
	2	* Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
	6	* The contents of this file constitute Original Code as defined in and
	7	* are subject to the Apple Public Source License Version 1.1 (the
	8	* "License"). You may not use this file except in compliance with the
	9	* License. Please obtain a copy of the License at
	10	* http://www.apple.com/publicsource and read it before using this file.
	11	*
	12	* This Original Code and all software distributed under the License are
	13	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	14	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	15	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	16	* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
	17	* License for the specific language governing rights and limitations
	18	* under the License.
	19	*
	20	* @APPLE_LICENSE_HEADER_END@
	21	*/
	22	/* Copyright (c) 1995, 1997 Apple Computer, Inc. All Rights Reserved */
	23	/*-
	24	* Copyright (c) 1986, 1989, 1991, 1993
	25	* The Regents of the University of California. All rights reserved.
	26	* (c) UNIX System Laboratories, Inc.
	27	* All or some portions of this file are derived from material licensed
	28	* to the University of California by American Telephone and Telegraph
	29	* Co. or Unix System Laboratories, Inc. and are reproduced herein with
	30	* the permission of UNIX System Laboratories, Inc.
	31	*
	32	* Redistribution and use in source and binary forms, with or without
	33	* modification, are permitted provided that the following conditions
	34	* are met:
	35	* 1. Redistributions of source code must retain the above copyright
	36	* notice, this list of conditions and the following disclaimer.
	37	* 2. Redistributions in binary form must reproduce the above copyright
	38	* notice, this list of conditions and the following disclaimer in the
	39	* documentation and/or other materials provided with the distribution.
	40	* 3. All advertising materials mentioning features or use of this software
	41	* must display the following acknowledgement:
	42	* This product includes software developed by the University of
	43	* California, Berkeley and its contributors.
	44	* 4. Neither the name of the University nor the names of its contributors
	45	* may be used to endorse or promote products derived from this software
	46	* without specific prior written permission.
	47	*
	48	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	49	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	50	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	51	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	52	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	53	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	54	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	55	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	56	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	57	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	58	* SUCH DAMAGE.
	59	*
	60	* @(#)proc_internal.h 8.15 (Berkeley) 5/19/95
	61	*/
	62
	63	#ifndef _SYS_PROC_INTERNAL_H_
	64	#define _SYS_PROC_INTERNAL_H_
65
66	#include <sys/proc.h>
67	__BEGIN_DECLS
68	#include <kern/locks.h>
69	__END_DECLS
70
71	/*
72	* One structure allocated per session.
73	*/
74	struct session {
75	int s_count; /* Ref cnt; pgrps in session. */
76	struct proc s_leader; / Session leader. */
77	struct vnode s_ttyvp; / Vnode of controlling terminal. */
78	struct tty s_ttyp; / Controlling terminal. */
79	pid_t s_sid; /* Session ID */
80	char s_login[MAXLOGNAME]; /* Setlogin() name. */
81	};
82
83	/*
84	* One structure allocated per process group.
85	*/
86	struct pgrp {
87	LIST_ENTRY(pgrp) pg_hash; /* Hash chain. */
88	LIST_HEAD(, proc) pg_members; /* Pointer to pgrp members. */
89	struct session pg_session; / Pointer to session. */
90	pid_t pg_id; /* Pgrp id. */
91	int pg_jobc; /* # procs qualifying pgrp for job control */
92	};
93
94	struct proc;
95
96	#define PROC_NULL (struct proc *)0;
97
98	#define p_session p_pgrp->pg_session
99	#define p_pgid p_pgrp->pg_id
100
101	/*
102	* Description of a process.
103	*
104	* This structure contains the information needed to manage a thread of
105	* control, known in UN*X as a process; it has references to substructures
106	* containing descriptions of things that the process uses, but may share
107	* with related processes. The process structure and the substructures
108	* are always addressible except for those marked "(PROC ONLY)" below,
109	* which might be addressible only on a processor on which the process
110	* is running.
111	*/
112	struct proc {
113	LIST_ENTRY(proc) p_list; /* List of all processes. */
114
115	/* substructures: */
116	struct ucred p_ucred; / Process owner's identity. */
117	struct filedesc p_fd; / Ptr to open files structure. */
118	struct pstats p_stats; / Accounting/statistics (PROC ONLY). */
119	struct plimit p_limit; / Process limits. */
120	struct sigacts p_sigacts; / Signal actions, state (PROC ONLY). */
121
122	#define p_rlimit p_limit->pl_rlimit
123
124	int p_flag; /* P_* flags. */
125	char p_stat; /* S* process status. */
126	char p_shutdownstate;
127	char p_pad1[2];
128
129	pid_t p_pid; /* Process identifier. */
130	LIST_ENTRY(proc) p_pglist; /* List of processes in pgrp. */
131	struct proc p_pptr; / Pointer to parent process. */
132	LIST_ENTRY(proc) p_sibling; /* List of sibling processes. */
133	LIST_HEAD(, proc) p_children; /* Pointer to list of children. */
134
135	/* The following fields are all zeroed upon creation in fork. */
136	#define p_startzero p_oppid
137
138	pid_t p_oppid; /* Save parent pid during ptrace. XXX */
139	int p_dupfd; /* Sideways return value from fdopen. XXX */
140
141	/* scheduling */
142	u_int p_estcpu; /* Time averaged value of p_cpticks. */
143	int p_cpticks; /* Ticks of cpu time. */
144	fixpt_t p_pctcpu; /* %cpu for this process during p_swtime */
145	void p_wchan; / Sleep address. */
146	char p_wmesg; / Reason for sleep. */
147	u_int p_swtime; /* DEPRECATED (Time swapped in or out.) */
148	#define p_argslen p_swtime /* Length of process arguments. */
149	u_int p_slptime; /* Time since last blocked. */
150
151	struct itimerval p_realtimer; /* Alarm timer. */
152	struct timeval p_rtime; /* Real time. */
153	u_quad_t p_uticks; /* Statclock hits in user mode. */
154	u_quad_t p_sticks; /* Statclock hits in system mode. */
155	u_quad_t p_iticks; /* Statclock hits processing intr. */
156
157	int p_traceflag; /* Kernel trace points. */
158	struct vnode p_tracep; / Trace to vnode. */
159
160	sigset_t p_siglist; /* DEPRECATED. */
161
162	struct vnode p_textvp; / Vnode of executable. */
163
164	/* End area that is zeroed on creation. */
165	#define p_endzero p_hash.le_next
166
167	/*
168	* Not copied, not zero'ed.
169	* Belongs after p_pid, but here to avoid shifting proc elements.
170	*/
171	LIST_ENTRY(proc) p_hash; /* Hash chain. */
172	TAILQ_HEAD( ,eventqelt) p_evlist;
173
174	/* The following fields are all copied upon creation in fork. */
175	#define p_startcopy p_sigmask
176
177	sigset_t p_sigmask; /* DEPRECATED */
178	sigset_t p_sigignore; /* Signals being ignored. */
179	sigset_t p_sigcatch; /* Signals being caught by user. */
180
181	u_char p_priority; /* Process priority. */
182	u_char p_usrpri; /* User-priority based on p_cpu and p_nice. */
183	char p_nice; /* Process "nice" value. */
184	char p_comm[MAXCOMLEN+1];
185
186	struct pgrp p_pgrp; / Pointer to process group. */
187
188	/* End area that is copied on creation. */
189	#define p_endcopy p_xstat
190
191	u_short p_xstat; /* Exit status for wait; also stop signal. */
192	u_short p_acflag; /* Accounting flags. */
193	struct rusage p_ru; / Exit information. XXX */
194
195	int p_debugger; /* 1: can exec set-bit programs if suser */
196
197	void task; / corresponding task */
198	void sigwait_thread; / 'thread' holding sigwait */
199	char signal_lock[72];
200	boolean_t sigwait; /* indication to suspend */
201	void exit_thread; / Which thread is exiting? */
202	user_addr_t user_stack; /* where user stack was allocated */
203	void * exitarg; /* exit arg for proc terminate */
204	void * vm_shm; /* for sysV shared memory */
205	int p_argc; /* saved argc for sysctl_procargs() */
206	int p_vforkcnt; /* number of outstanding vforks */
207	void * p_vforkact; /* activation running this vfork proc */
208	TAILQ_HEAD( , uthread) p_uthlist; /* List of uthreads */
209	/* Following fields are info from SIGCHLD */
210	pid_t si_pid;
211	u_short si_status;
212	u_short si_code;
213	uid_t si_uid;
214	TAILQ_HEAD( , aio_workq_entry ) aio_activeq; /* active async IO requests */
215	int aio_active_count; /* entries on aio_activeq */
216	TAILQ_HEAD( , aio_workq_entry ) aio_doneq; /* completed async IO requests */
217	int aio_done_count; /* entries on aio_doneq */
218
219	struct klist p_klist; /* knote list */
220	lck_mtx_t p_mlock; /* proc lock to protect evques */
221	lck_mtx_t p_fdmlock; /* proc lock to protect evques */
222	unsigned int p_fdlock_pc[4];
223	unsigned int p_fdunlock_pc[4];
224	int p_fpdrainwait;
225	int p_lflag; /* local flags */
226	#if DIAGNOSTIC
227	#if SIGNAL_DEBUG
228	unsigned int lockpc[8];
229	unsigned int unlockpc[8];
230	#endif /* SIGNAL_DEBUG */
231	#endif /* DIAGNOSTIC */
232	};
233
234
235	#define P_LDELAYTERM 0x1 /* */
236	#define P_LNOZOMB 0x2 /* */
237	#define P_LLOW_PRI_IO 0x4
238	#define P_LPEXIT 0x8
239	#define P_LBACKGROUND_IO 0x10
240
241	// LP64todo - should this move?
242	/* LP64 version of extern_proc. all pointers
243	* grow when we're dealing with a 64-bit process.
244	* WARNING - keep in sync with extern_proc
245	* but use native alignment of 64-bit process.
246	*/
247
248	#ifdef KERNEL
249	#include <sys/time.h> /* user_timeval, user_itimerval */
250
251	#if __DARWIN_ALIGN_NATURAL
252	#pragma options align=natural
253	#endif
254
255	struct user_extern_proc {
256	union {
257	struct {
258	user_addr_t __p_forw; /* Doubly-linked run/sleep queue. */
259	user_addr_t __p_back;
260	} p_st1;
261	struct user_timeval __p_starttime; /* process start time */
262	} p_un;
263	user_addr_t p_vmspace; /* Address space. */
264	user_addr_t p_sigacts; /* Signal actions, state (PROC ONLY). */
265	int p_flag; /* P_* flags. */
266	char p_stat; /* S* process status. */
267	pid_t p_pid; /* Process identifier. */
268	pid_t p_oppid; /* Save parent pid during ptrace. XXX */
269	int p_dupfd; /* Sideways return value from fdopen. XXX */
270	/* Mach related */
271	user_addr_t user_stack; /* where user stack was allocated */
272	user_addr_t exit_thread; /* XXX Which thread is exiting? */
273	int p_debugger; /* allow to debug */
274	boolean_t sigwait; /* indication to suspend */
275	/* scheduling */
276	u_int p_estcpu; /* Time averaged value of p_cpticks. */
277	int p_cpticks; /* Ticks of cpu time. */
278	fixpt_t p_pctcpu; /* %cpu for this process during p_swtime */
279	user_addr_t p_wchan; /* Sleep address. */
280	user_addr_t p_wmesg; /* Reason for sleep. */
281	u_int p_swtime; /* Time swapped in or out. */
282	u_int p_slptime; /* Time since last blocked. */
283	struct user_itimerval p_realtimer; /* Alarm timer. */
284	struct user_timeval p_rtime; /* Real time. */
285	u_quad_t p_uticks; /* Statclock hits in user mode. */
286	u_quad_t p_sticks; /* Statclock hits in system mode. */
287	u_quad_t p_iticks; /* Statclock hits processing intr. */
288	int p_traceflag; /* Kernel trace points. */
289	user_addr_t p_tracep; /* Trace to vnode. */
290	int p_siglist; /* DEPRECATED */
291	user_addr_t p_textvp; /* Vnode of executable. */
292	int p_holdcnt; /* If non-zero, don't swap. */
293	sigset_t p_sigmask; /* DEPRECATED. */
294	sigset_t p_sigignore; /* Signals being ignored. */
295	sigset_t p_sigcatch; /* Signals being caught by user. */
296	u_char p_priority; /* Process priority. */
297	u_char p_usrpri; /* User-priority based on p_cpu and p_nice. */
298	char p_nice; /* Process "nice" value. */
299	char p_comm[MAXCOMLEN+1];
300	user_addr_t p_pgrp; /* Pointer to process group. */
301	user_addr_t p_addr; /* Kernel virtual addr of u-area (PROC ONLY). */
302	u_short p_xstat; /* Exit status for wait; also stop signal. */
303	u_short p_acflag; /* Accounting flags. */
304	user_addr_t p_ru; /* Exit information. XXX */
305	};
306
307	#if __DARWIN_ALIGN_NATURAL
308	#pragma options align=reset
309	#endif
310	#endif /* KERNEL */
311
312	/*
313	* We use process IDs <= PID_MAX; PID_MAX + 1 must also fit in a pid_t,
314	* as it is used to represent "no process group".
315	*/
316	extern int nprocs, maxproc; /* Current and max number of procs. */
317	__private_extern__ int hard_maxproc; /* hard limit */
318
319	#define PID_MAX 30000
320	#define NO_PID 30001
321
322	#define SESS_LEADER(p) ((p)->p_session->s_leader == (p))
323	#define SESSHOLD(s) ((s)->s_count++)
324	#define SESSRELE(s) sessrele(s)
325
326	#define PIDHASH(pid) (&pidhashtbl[(pid) & pidhash])
327	extern LIST_HEAD(pidhashhead, proc) *pidhashtbl;
328	extern u_long pidhash;
329
330	#define PGRPHASH(pgid) (&pgrphashtbl[(pgid) & pgrphash])
331	extern LIST_HEAD(pgrphashhead, pgrp) *pgrphashtbl;
332	extern u_long pgrphash;
333	extern lck_grp_t * proc_lck_grp;
334	extern lck_grp_attr_t * proc_lck_grp_attr;
335	extern lck_attr_t * proc_lck_attr;
336
337	LIST_HEAD(proclist, proc);
338	extern struct proclist allproc; /* List of all processes. */
339	extern struct proclist zombproc; /* List of zombie processes. */
340	extern struct proc *initproc;
341	extern void pgdelete(struct pgrp *pgrp);
342	extern void sessrele(struct session *sess);
343	extern void procinit(void);
344	extern void proc_lock(struct proc *);
345	extern void proc_unlock(struct proc *);
346	extern void proc_fdlock(struct proc *);
347	extern void proc_fdunlock(struct proc *);
348	__private_extern__ char proc_core_name(const char name, uid_t uid, pid_t pid);
349	extern int isinferior(struct proc , struct proc );
350	extern struct proc pfind(pid_t); / Find process by id. */
351	__private_extern__ struct proc pzfind(pid_t); / Find zombie by id. */
352	extern struct pgrp pgfind(pid_t); / Find process group by id. */
353
354	extern int chgproccnt(uid_t uid, int diff);
355	extern int enterpgrp(struct proc *p, pid_t pgid, int mksess);
356	extern void fixjobc(struct proc p, struct pgrp pgrp, int entering);
357	extern int inferior(struct proc *p);
358	extern int leavepgrp(struct proc *p);
359	extern void resetpriority(struct proc *);
360	extern void setrunnable(struct proc *);
361	extern void setrunqueue(struct proc *);
362	extern int sleep(void *chan, int pri);
363	extern int tsleep0(void chan, int pri, const char wmesg, int timo, int (*continuation)(int));
364	extern int tsleep1(void chan, int pri, const char wmesg, u_int64_t abstime, int (*continuation)(int));
365	extern int msleep0(void chan, lck_mtx_t mtx, int pri, const char wmesg, int timo, int (continuation)(int));
366	extern void vfork_return(thread_t th_act, struct proc p, struct proc p2, register_t *retval);
367
368
369	#endif /* !_SYS_PROC_INTERNAL_H_ */