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freebsd-skq/sys/sys/proc.h
Konstantin Belousov 2d88da2f06 Move struct syscall_args syscall arguments parameters container into 
struct thread.

For all architectures, the syscall trap handlers have to allocate the
structure on the stack.  The structure takes 88 bytes on 64bit arches
which is not negligible.  Also, it cannot be easily found by other
code, which e.g. caused duplication of some members of the structure
to struct thread already.  The change removes td_dbg_sc_code and
td_dbg_sc_nargs which were directly copied from syscall_args.

The structure is put into the copied on fork part of the struct thread
to make the syscall arguments information correct in the child after
fork.

This move will also allow several more uses shortly.

Reviewed by:	jhb (previous version)
Sponsored by:	The FreeBSD Foundation
MFC after:	3 weeks
X-Differential revision:	https://reviews.freebsd.org/D11080
2017-06-12 21:03:23 +00:00

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/*-
* 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. 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.h 8.15 (Berkeley) 5/19/95
* $FreeBSD$
*/
#ifndef _SYS_PROC_H_
#define _SYS_PROC_H_
#include <sys/callout.h> /* For struct callout. */
#include <sys/event.h> /* For struct klist. */
#include <sys/condvar.h>
#ifndef _KERNEL
#include <sys/filedesc.h>
#endif
#include <sys/queue.h>
#include <sys/_lock.h>
#include <sys/lock_profile.h>
#include <sys/_mutex.h>
#include <sys/osd.h>
#include <sys/priority.h>
#include <sys/rtprio.h> /* XXX. */
#include <sys/runq.h>
#include <sys/resource.h>
#include <sys/sigio.h>
#include <sys/signal.h>
#include <sys/signalvar.h>
#ifndef _KERNEL
#include <sys/time.h> /* For structs itimerval, timeval. */
#else
#include <sys/pcpu.h>
#endif
#include <sys/ucontext.h>
#include <sys/ucred.h>
#include <sys/_vm_domain.h>
#include <machine/proc.h> /* Machine-dependent proc substruct. */
/*
* One structure allocated per session.
*
* List of locks
* (m) locked by s_mtx mtx
* (e) locked by proctree_lock sx
* (c) const until freeing
*/
struct session {
u_int s_count; /* Ref cnt; pgrps in session - atomic. */
struct proc *s_leader; /* (m + e) Session leader. */
struct vnode *s_ttyvp; /* (m) Vnode of controlling tty. */
struct cdev_priv *s_ttydp; /* (m) Device of controlling tty. */
struct tty *s_ttyp; /* (e) Controlling tty. */
pid_t s_sid; /* (c) Session ID. */
/* (m) Setlogin() name: */
char s_login[roundup(MAXLOGNAME, sizeof(long))];
struct mtx s_mtx; /* Mutex to protect members. */
};
/*
* One structure allocated per process group.
*
* List of locks
* (m) locked by pg_mtx mtx
* (e) locked by proctree_lock sx
* (c) const until freeing
*/
struct pgrp {
LIST_ENTRY(pgrp) pg_hash; /* (e) Hash chain. */
LIST_HEAD(, proc) pg_members; /* (m + e) Pointer to pgrp members. */
struct session *pg_session; /* (c) Pointer to session. */
struct sigiolst pg_sigiolst; /* (m) List of sigio sources. */
pid_t pg_id; /* (c) Process group id. */
int pg_jobc; /* (m) Job control process count. */
struct mtx pg_mtx; /* Mutex to protect members */
};
/*
* pargs, used to hold a copy of the command line, if it had a sane length.
*/
struct pargs {
u_int ar_ref; /* Reference count. */
u_int ar_length; /* Length. */
u_char ar_args[1]; /* Arguments. */
};
/*-
* 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 addressable except for those marked "(CPU)" below,
* which might be addressable only on a processor on which the process
* is running.
*
* Below is a key of locks used to protect each member of struct proc. The
* lock is indicated by a reference to a specific character in parens in the
* associated comment.
* * - not yet protected
* a - only touched by curproc or parent during fork/wait
* b - created at fork, never changes
* (exception aiods switch vmspaces, but they are also
* marked 'P_SYSTEM' so hopefully it will be left alone)
* c - locked by proc mtx
* d - locked by allproc_lock lock
* e - locked by proctree_lock lock
* f - session mtx
* g - process group mtx
* h - callout_lock mtx
* i - by curproc or the master session mtx
* j - locked by proc slock
* k - only accessed by curthread
* k*- only accessed by curthread and from an interrupt
* kx- only accessed by curthread and by debugger
* l - the attaching proc or attaching proc parent
* m - Giant
* n - not locked, lazy
* o - ktrace lock
* q - td_contested lock
* r - p_peers lock
* s - see sleepq_switch(), sleeping_on_old_rtc(), and sleep(9)
* t - thread lock
* u - process stat lock
* w - process timer lock
* x - created at fork, only changes during single threading in exec
* y - created at first aio, doesn't change until exit or exec at which
* point we are single-threaded and only curthread changes it
* z - zombie threads lock
*
* If the locking key specifies two identifiers (for example, p_pptr) then
* either lock is sufficient for read access, but both locks must be held
* for write access.
*/
struct cpuset;
struct filecaps;
struct filemon;
struct kaioinfo;
struct kaudit_record;
struct kdtrace_proc;
struct kdtrace_thread;
struct mqueue_notifier;
struct nlminfo;
struct p_sched;
struct proc;
struct procdesc;
struct racct;
struct sbuf;
struct sleepqueue;
struct syscall_args;
struct td_sched;
struct thread;
struct trapframe;
struct turnstile;
/*
* XXX: Does this belong in resource.h or resourcevar.h instead?
* Resource usage extension. The times in rusage structs in the kernel are
* never up to date. The actual times are kept as runtimes and tick counts
* (with control info in the "previous" times), and are converted when
* userland asks for rusage info. Backwards compatibility prevents putting
* this directly in the user-visible rusage struct.
*
* Locking for p_rux: (cu) means (u) for p_rux and (c) for p_crux.
* Locking for td_rux: (t) for all fields.
*/
struct rusage_ext {
uint64_t rux_runtime; /* (cu) Real time. */
uint64_t rux_uticks; /* (cu) Statclock hits in user mode. */
uint64_t rux_sticks; /* (cu) Statclock hits in sys mode. */
uint64_t rux_iticks; /* (cu) Statclock hits in intr mode. */
uint64_t rux_uu; /* (c) Previous user time in usec. */
uint64_t rux_su; /* (c) Previous sys time in usec. */
uint64_t rux_tu; /* (c) Previous total time in usec. */
};
/*
* Kernel runnable context (thread).
* This is what is put to sleep and reactivated.
* Thread context. Processes may have multiple threads.
*/
struct thread {
struct mtx *volatile td_lock; /* replaces sched lock */
struct proc *td_proc; /* (*) Associated process. */
TAILQ_ENTRY(thread) td_plist; /* (*) All threads in this proc. */
TAILQ_ENTRY(thread) td_runq; /* (t) Run queue. */
TAILQ_ENTRY(thread) td_slpq; /* (t) Sleep queue. */
TAILQ_ENTRY(thread) td_lockq; /* (t) Lock queue. */
LIST_ENTRY(thread) td_hash; /* (d) Hash chain. */
struct cpuset *td_cpuset; /* (t) CPU affinity mask. */
struct seltd *td_sel; /* Select queue/channel. */
struct sleepqueue *td_sleepqueue; /* (k) Associated sleep queue. */
struct turnstile *td_turnstile; /* (k) Associated turnstile. */
struct rl_q_entry *td_rlqe; /* (k) Associated range lock entry. */
struct umtx_q *td_umtxq; /* (c?) Link for when we're blocked. */
struct vm_domain_policy td_vm_dom_policy; /* (c) current numa domain policy */
lwpid_t td_tid; /* (b) Thread ID. */
sigqueue_t td_sigqueue; /* (c) Sigs arrived, not delivered. */
#define td_siglist td_sigqueue.sq_signals
u_char td_lend_user_pri; /* (t) Lend user pri. */
/* Cleared during fork1() */
#define td_startzero td_flags
int td_flags; /* (t) TDF_* flags. */
int td_inhibitors; /* (t) Why can not run. */
int td_pflags; /* (k) Private thread (TDP_*) flags. */
int td_dupfd; /* (k) Ret value from fdopen. XXX */
int td_sqqueue; /* (t) Sleepqueue queue blocked on. */
void *td_wchan; /* (t) Sleep address. */
const char *td_wmesg; /* (t) Reason for sleep. */
volatile u_char td_owepreempt; /* (k*) Preempt on last critical_exit */
u_char td_tsqueue; /* (t) Turnstile queue blocked on. */
short td_locks; /* (k) Debug: count of non-spin locks */
short td_rw_rlocks; /* (k) Count of rwlock read locks. */
short td_lk_slocks; /* (k) Count of lockmgr shared locks. */
short td_stopsched; /* (k) Scheduler stopped. */
struct turnstile *td_blocked; /* (t) Lock thread is blocked on. */
const char *td_lockname; /* (t) Name of lock blocked on. */
LIST_HEAD(, turnstile) td_contested; /* (q) Contested locks. */
struct lock_list_entry *td_sleeplocks; /* (k) Held sleep locks. */
int td_intr_nesting_level; /* (k) Interrupt recursion. */
int td_pinned; /* (k) Temporary cpu pin count. */
struct ucred *td_ucred; /* (k) Reference to credentials. */
struct plimit *td_limit; /* (k) Resource limits. */
int td_slptick; /* (t) Time at sleep. */
int td_blktick; /* (t) Time spent blocked. */
int td_swvoltick; /* (t) Time at last SW_VOL switch. */
int td_swinvoltick; /* (t) Time at last SW_INVOL switch. */
u_int td_cow; /* (*) Number of copy-on-write faults */
struct rusage td_ru; /* (t) rusage information. */
struct rusage_ext td_rux; /* (t) Internal rusage information. */
uint64_t td_incruntime; /* (t) Cpu ticks to transfer to proc. */
uint64_t td_runtime; /* (t) How many cpu ticks we've run. */
u_int td_pticks; /* (t) Statclock hits for profiling */
u_int td_sticks; /* (t) Statclock hits in system mode. */
u_int td_iticks; /* (t) Statclock hits in intr mode. */
u_int td_uticks; /* (t) Statclock hits in user mode. */
int td_intrval; /* (t) Return value for sleepq. */
sigset_t td_oldsigmask; /* (k) Saved mask from pre sigpause. */
volatile u_int td_generation; /* (k) For detection of preemption */
stack_t td_sigstk; /* (k) Stack ptr and on-stack flag. */
int td_xsig; /* (c) Signal for ptrace */
u_long td_profil_addr; /* (k) Temporary addr until AST. */
u_int td_profil_ticks; /* (k) Temporary ticks until AST. */
char td_name[MAXCOMLEN + 1]; /* (*) Thread name. */
struct file *td_fpop; /* (k) file referencing cdev under op */
int td_dbgflags; /* (c) Userland debugger flags */
siginfo_t td_si; /* (c) For debugger or core file */
int td_ng_outbound; /* (k) Thread entered ng from above. */
struct osd td_osd; /* (k) Object specific data. */
struct vm_map_entry *td_map_def_user; /* (k) Deferred entries. */
pid_t td_dbg_forked; /* (c) Child pid for debugger. */
u_int td_vp_reserv; /* (k) Count of reserved vnodes. */
int td_no_sleeping; /* (k) Sleeping disabled count. */
int td_dom_rr_idx; /* (k) RR Numa domain selection. */
void *td_su; /* (k) FFS SU private */
sbintime_t td_sleeptimo; /* (t) Sleep timeout. */
int td_rtcgen; /* (s) rtc_generation of abs. sleep */
#define td_endzero td_sigmask
/* Copied during fork1() or create_thread(). */
#define td_startcopy td_endzero
sigset_t td_sigmask; /* (c) Current signal mask. */
u_char td_rqindex; /* (t) Run queue index. */
u_char td_base_pri; /* (t) Thread base kernel priority. */
u_char td_priority; /* (t) Thread active priority. */
u_char td_pri_class; /* (t) Scheduling class. */
u_char td_user_pri; /* (t) User pri from estcpu and nice. */
u_char td_base_user_pri; /* (t) Base user pri */
uintptr_t td_rb_list; /* (k) Robust list head. */
uintptr_t td_rbp_list; /* (k) Robust priv list head. */
uintptr_t td_rb_inact; /* (k) Current in-action mutex loc. */
struct syscall_args td_sa; /* (kx) Syscall parameters. Copied on
fork for child tracing. */
#define td_endcopy td_pcb
/*
* Fields that must be manually set in fork1() or create_thread()
* or already have been set in the allocator, constructor, etc.
*/
struct pcb *td_pcb; /* (k) Kernel VA of pcb and kstack. */
enum {
TDS_INACTIVE = 0x0,
TDS_INHIBITED,
TDS_CAN_RUN,
TDS_RUNQ,
TDS_RUNNING
} td_state; /* (t) thread state */
union {
register_t tdu_retval[2];
off_t tdu_off;
} td_uretoff; /* (k) Syscall aux returns. */
#define td_retval td_uretoff.tdu_retval
u_int td_cowgen; /* (k) Generation of COW pointers. */
struct callout td_slpcallout; /* (h) Callout for sleep. */
struct trapframe *td_frame; /* (k) */
struct vm_object *td_kstack_obj;/* (a) Kstack object. */
vm_offset_t td_kstack; /* (a) Kernel VA of kstack. */
int td_kstack_pages; /* (a) Size of the kstack. */
volatile u_int td_critnest; /* (k*) Critical section nest level. */
struct mdthread td_md; /* (k) Any machine-dependent fields. */
struct kaudit_record *td_ar; /* (k) Active audit record, if any. */
struct lpohead td_lprof[2]; /* (a) lock profiling objects. */
struct kdtrace_thread *td_dtrace; /* (*) DTrace-specific data. */
int td_errno; /* Error returned by last syscall. */
struct vnet *td_vnet; /* (k) Effective vnet. */
const char *td_vnet_lpush; /* (k) Debugging vnet push / pop. */
struct trapframe *td_intr_frame;/* (k) Frame of the current irq */
struct proc *td_rfppwait_p; /* (k) The vforked child */
struct vm_page **td_ma; /* (k) uio pages held */
int td_ma_cnt; /* (k) size of *td_ma */
void *td_emuldata; /* Emulator state data */
int td_lastcpu; /* (t) Last cpu we were on. */
int td_oncpu; /* (t) Which cpu we are on. */
void *td_lkpi_task; /* LinuxKPI task struct pointer */
};
struct thread0_storage {
struct thread t0st_thread;
uint64_t t0st_sched[10];
};
struct mtx *thread_lock_block(struct thread *);
void thread_lock_unblock(struct thread *, struct mtx *);
void thread_lock_set(struct thread *, struct mtx *);
#define THREAD_LOCK_ASSERT(td, type) \
do { \
struct mtx *__m = (td)->td_lock; \
if (__m != &blocked_lock) \
mtx_assert(__m, (type)); \
} while (0)
#ifdef INVARIANTS
#define THREAD_LOCKPTR_ASSERT(td, lock) \
do { \
struct mtx *__m = (td)->td_lock; \
KASSERT((__m == &blocked_lock || __m == (lock)), \
("Thread %p lock %p does not match %p", td, __m, (lock))); \
} while (0)
#define TD_LOCKS_INC(td) ((td)->td_locks++)
#define TD_LOCKS_DEC(td) ((td)->td_locks--)
#else
#define THREAD_LOCKPTR_ASSERT(td, lock)
#define TD_LOCKS_INC(td)
#define TD_LOCKS_DEC(td)
#endif
/*
* Flags kept in td_flags:
* To change these you MUST have the scheduler lock.
*/
#define TDF_BORROWING 0x00000001 /* Thread is borrowing pri from another. */
#define TDF_INPANIC 0x00000002 /* Caused a panic, let it drive crashdump. */
#define TDF_INMEM 0x00000004 /* Thread's stack is in memory. */
#define TDF_SINTR 0x00000008 /* Sleep is interruptible. */
#define TDF_TIMEOUT 0x00000010 /* Timing out during sleep. */
#define TDF_IDLETD 0x00000020 /* This is a per-CPU idle thread. */
#define TDF_CANSWAP 0x00000040 /* Thread can be swapped. */
#define TDF_SLEEPABORT 0x00000080 /* sleepq_abort was called. */
#define TDF_KTH_SUSP 0x00000100 /* kthread is suspended */
#define TDF_ALLPROCSUSP 0x00000200 /* suspended by SINGLE_ALLPROC */
#define TDF_BOUNDARY 0x00000400 /* Thread suspended at user boundary */
#define TDF_ASTPENDING 0x00000800 /* Thread has some asynchronous events. */
#define TDF_UNUSED12 0x00001000 /* --available-- */
#define TDF_SBDRY 0x00002000 /* Stop only on usermode boundary. */
#define TDF_UPIBLOCKED 0x00004000 /* Thread blocked on user PI mutex. */
#define TDF_NEEDSUSPCHK 0x00008000 /* Thread may need to suspend. */
#define TDF_NEEDRESCHED 0x00010000 /* Thread needs to yield. */
#define TDF_NEEDSIGCHK 0x00020000 /* Thread may need signal delivery. */
#define TDF_NOLOAD 0x00040000 /* Ignore during load avg calculations. */
#define TDF_SERESTART 0x00080000 /* ERESTART on stop attempts. */
#define TDF_THRWAKEUP 0x00100000 /* Libthr thread must not suspend itself. */
#define TDF_SEINTR 0x00200000 /* EINTR on stop attempts. */
#define TDF_SWAPINREQ 0x00400000 /* Swapin request due to wakeup. */
#define TDF_UNUSED23 0x00800000 /* --available-- */
#define TDF_SCHED0 0x01000000 /* Reserved for scheduler private use */
#define TDF_SCHED1 0x02000000 /* Reserved for scheduler private use */
#define TDF_SCHED2 0x04000000 /* Reserved for scheduler private use */
#define TDF_SCHED3 0x08000000 /* Reserved for scheduler private use */
#define TDF_ALRMPEND 0x10000000 /* Pending SIGVTALRM needs to be posted. */
#define TDF_PROFPEND 0x20000000 /* Pending SIGPROF needs to be posted. */
#define TDF_MACPEND 0x40000000 /* AST-based MAC event pending. */
/* Userland debug flags */
#define TDB_SUSPEND 0x00000001 /* Thread is suspended by debugger */
#define TDB_XSIG 0x00000002 /* Thread is exchanging signal under trace */
#define TDB_USERWR 0x00000004 /* Debugger modified memory or registers */
#define TDB_SCE 0x00000008 /* Thread performs syscall enter */
#define TDB_SCX 0x00000010 /* Thread performs syscall exit */
#define TDB_EXEC 0x00000020 /* TDB_SCX from exec(2) family */
#define TDB_FORK 0x00000040 /* TDB_SCX from fork(2) that created new
process */
#define TDB_STOPATFORK 0x00000080 /* Stop at the return from fork (child
only) */
#define TDB_CHILD 0x00000100 /* New child indicator for ptrace() */
#define TDB_BORN 0x00000200 /* New LWP indicator for ptrace() */
#define TDB_EXIT 0x00000400 /* Exiting LWP indicator for ptrace() */
#define TDB_VFORK 0x00000800 /* vfork indicator for ptrace() */
#define TDB_FSTP 0x00001000 /* The thread is PT_ATTACH leader */
/*
* "Private" flags kept in td_pflags:
* These are only written by curthread and thus need no locking.
*/
#define TDP_OLDMASK 0x00000001 /* Need to restore mask after suspend. */
#define TDP_INKTR 0x00000002 /* Thread is currently in KTR code. */
#define TDP_INKTRACE 0x00000004 /* Thread is currently in KTRACE code. */
#define TDP_BUFNEED 0x00000008 /* Do not recurse into the buf flush */
#define TDP_COWINPROGRESS 0x00000010 /* Snapshot copy-on-write in progress. */
#define TDP_ALTSTACK 0x00000020 /* Have alternate signal stack. */
#define TDP_DEADLKTREAT 0x00000040 /* Lock acquisition - deadlock treatment. */
#define TDP_NOFAULTING 0x00000080 /* Do not handle page faults. */
#define TDP_UNUSED9 0x00000100 /* --available-- */
#define TDP_OWEUPC 0x00000200 /* Call addupc() at next AST. */
#define TDP_ITHREAD 0x00000400 /* Thread is an interrupt thread. */
#define TDP_SYNCIO 0x00000800 /* Local override, disable async i/o. */
#define TDP_SCHED1 0x00001000 /* Reserved for scheduler private use */
#define TDP_SCHED2 0x00002000 /* Reserved for scheduler private use */
#define TDP_SCHED3 0x00004000 /* Reserved for scheduler private use */
#define TDP_SCHED4 0x00008000 /* Reserved for scheduler private use */
#define TDP_GEOM 0x00010000 /* Settle GEOM before finishing syscall */
#define TDP_SOFTDEP 0x00020000 /* Stuck processing softdep worklist */
#define TDP_NORUNNINGBUF 0x00040000 /* Ignore runningbufspace check */
#define TDP_WAKEUP 0x00080000 /* Don't sleep in umtx cond_wait */
#define TDP_INBDFLUSH 0x00100000 /* Already in BO_BDFLUSH, do not recurse */
#define TDP_KTHREAD 0x00200000 /* This is an official kernel thread */
#define TDP_CALLCHAIN 0x00400000 /* Capture thread's callchain */
#define TDP_IGNSUSP 0x00800000 /* Permission to ignore the MNTK_SUSPEND* */
#define TDP_AUDITREC 0x01000000 /* Audit record pending on thread */
#define TDP_RFPPWAIT 0x02000000 /* Handle RFPPWAIT on syscall exit */
#define TDP_RESETSPUR 0x04000000 /* Reset spurious page fault history. */
#define TDP_NERRNO 0x08000000 /* Last errno is already in td_errno */
#define TDP_UIOHELD 0x10000000 /* Current uio has pages held in td_ma */
#define TDP_FORKING 0x20000000 /* Thread is being created through fork() */
#define TDP_EXECVMSPC 0x40000000 /* Execve destroyed old vmspace */
/*
* Reasons that the current thread can not be run yet.
* More than one may apply.
*/
#define TDI_SUSPENDED 0x0001 /* On suspension queue. */
#define TDI_SLEEPING 0x0002 /* Actually asleep! (tricky). */
#define TDI_SWAPPED 0x0004 /* Stack not in mem. Bad juju if run. */
#define TDI_LOCK 0x0008 /* Stopped on a lock. */
#define TDI_IWAIT 0x0010 /* Awaiting interrupt. */
#define TD_IS_SLEEPING(td) ((td)->td_inhibitors & TDI_SLEEPING)
#define TD_ON_SLEEPQ(td) ((td)->td_wchan != NULL)
#define TD_IS_SUSPENDED(td) ((td)->td_inhibitors & TDI_SUSPENDED)
#define TD_IS_SWAPPED(td) ((td)->td_inhibitors & TDI_SWAPPED)
#define TD_ON_LOCK(td) ((td)->td_inhibitors & TDI_LOCK)
#define TD_AWAITING_INTR(td) ((td)->td_inhibitors & TDI_IWAIT)
#define TD_IS_RUNNING(td) ((td)->td_state == TDS_RUNNING)
#define TD_ON_RUNQ(td) ((td)->td_state == TDS_RUNQ)
#define TD_CAN_RUN(td) ((td)->td_state == TDS_CAN_RUN)
#define TD_IS_INHIBITED(td) ((td)->td_state == TDS_INHIBITED)
#define TD_ON_UPILOCK(td) ((td)->td_flags & TDF_UPIBLOCKED)
#define TD_IS_IDLETHREAD(td) ((td)->td_flags & TDF_IDLETD)
#define KTDSTATE(td) \
(((td)->td_inhibitors & TDI_SLEEPING) != 0 ? "sleep" : \
((td)->td_inhibitors & TDI_SUSPENDED) != 0 ? "suspended" : \
((td)->td_inhibitors & TDI_SWAPPED) != 0 ? "swapped" : \
((td)->td_inhibitors & TDI_LOCK) != 0 ? "blocked" : \
((td)->td_inhibitors & TDI_IWAIT) != 0 ? "iwait" : "yielding")
#define TD_SET_INHIB(td, inhib) do { \
(td)->td_state = TDS_INHIBITED; \
(td)->td_inhibitors |= (inhib); \
} while (0)
#define TD_CLR_INHIB(td, inhib) do { \
if (((td)->td_inhibitors & (inhib)) && \
(((td)->td_inhibitors &= ~(inhib)) == 0)) \
(td)->td_state = TDS_CAN_RUN; \
} while (0)
#define TD_SET_SLEEPING(td) TD_SET_INHIB((td), TDI_SLEEPING)
#define TD_SET_SWAPPED(td) TD_SET_INHIB((td), TDI_SWAPPED)
#define TD_SET_LOCK(td) TD_SET_INHIB((td), TDI_LOCK)
#define TD_SET_SUSPENDED(td) TD_SET_INHIB((td), TDI_SUSPENDED)
#define TD_SET_IWAIT(td) TD_SET_INHIB((td), TDI_IWAIT)
#define TD_SET_EXITING(td) TD_SET_INHIB((td), TDI_EXITING)
#define TD_CLR_SLEEPING(td) TD_CLR_INHIB((td), TDI_SLEEPING)
#define TD_CLR_SWAPPED(td) TD_CLR_INHIB((td), TDI_SWAPPED)
#define TD_CLR_LOCK(td) TD_CLR_INHIB((td), TDI_LOCK)
#define TD_CLR_SUSPENDED(td) TD_CLR_INHIB((td), TDI_SUSPENDED)
#define TD_CLR_IWAIT(td) TD_CLR_INHIB((td), TDI_IWAIT)
#define TD_SET_RUNNING(td) (td)->td_state = TDS_RUNNING
#define TD_SET_RUNQ(td) (td)->td_state = TDS_RUNQ
#define TD_SET_CAN_RUN(td) (td)->td_state = TDS_CAN_RUN
#define TD_SBDRY_INTR(td) \
(((td)->td_flags & (TDF_SEINTR | TDF_SERESTART)) != 0)
#define TD_SBDRY_ERRNO(td) \
(((td)->td_flags & TDF_SEINTR) != 0 ? EINTR : ERESTART)
/*
* Process structure.
*/
struct proc {
LIST_ENTRY(proc) p_list; /* (d) List of all processes. */
TAILQ_HEAD(, thread) p_threads; /* (c) all threads. */
struct mtx p_slock; /* process spin lock */
struct ucred *p_ucred; /* (c) Process owner's identity. */
struct filedesc *p_fd; /* (b) Open files. */
struct filedesc_to_leader *p_fdtol; /* (b) Tracking node */
struct pstats *p_stats; /* (b) Accounting/statistics (CPU). */
struct plimit *p_limit; /* (c) Resource limits. */
struct callout p_limco; /* (c) Limit callout handle */
struct sigacts *p_sigacts; /* (x) Signal actions, state (CPU). */
int p_flag; /* (c) P_* flags. */
int p_flag2; /* (c) P2_* flags. */
enum {
PRS_NEW = 0, /* In creation */
PRS_NORMAL, /* threads can be run. */
PRS_ZOMBIE
} p_state; /* (j/c) Process status. */
pid_t p_pid; /* (b) Process identifier. */
LIST_ENTRY(proc) p_hash; /* (d) Hash chain. */
LIST_ENTRY(proc) p_pglist; /* (g + e) List of processes in pgrp. */
struct proc *p_pptr; /* (c + e) Pointer to parent process. */
LIST_ENTRY(proc) p_sibling; /* (e) List of sibling processes. */
LIST_HEAD(, proc) p_children; /* (e) Pointer to list of children. */
struct proc *p_reaper; /* (e) My reaper. */
LIST_HEAD(, proc) p_reaplist; /* (e) List of my descendants
(if I am reaper). */
LIST_ENTRY(proc) p_reapsibling; /* (e) List of siblings - descendants of
the same reaper. */
struct mtx p_mtx; /* (n) Lock for this struct. */
struct mtx p_statmtx; /* Lock for the stats */
struct mtx p_itimmtx; /* Lock for the virt/prof timers */
struct mtx p_profmtx; /* Lock for the profiling */
struct ksiginfo *p_ksi; /* Locked by parent proc lock */
sigqueue_t p_sigqueue; /* (c) Sigs not delivered to a td. */
#define p_siglist p_sigqueue.sq_signals
/* The following fields are all zeroed upon creation in fork. */
#define p_startzero p_oppid
pid_t p_oppid; /* (c + e) Save ppid in ptrace. XXX */
struct vmspace *p_vmspace; /* (b) Address space. */
u_int p_swtick; /* (c) Tick when swapped in or out. */
u_int p_cowgen; /* (c) Generation of COW pointers. */
struct itimerval p_realtimer; /* (c) Alarm timer. */
struct rusage p_ru; /* (a) Exit information. */
struct rusage_ext p_rux; /* (cu) Internal resource usage. */
struct rusage_ext p_crux; /* (c) Internal child resource usage. */
int p_profthreads; /* (c) Num threads in addupc_task. */
volatile int p_exitthreads; /* (j) Number of threads exiting */
int p_traceflag; /* (o) Kernel trace points. */
struct vnode *p_tracevp; /* (c + o) Trace to vnode. */
struct ucred *p_tracecred; /* (o) Credentials to trace with. */
struct vnode *p_textvp; /* (b) Vnode of executable. */
u_int p_lock; /* (c) Proclock (prevent swap) count. */
struct sigiolst p_sigiolst; /* (c) List of sigio sources. */
int p_sigparent; /* (c) Signal to parent on exit. */
int p_sig; /* (n) For core dump/debugger XXX. */
u_long p_code; /* (n) For core dump/debugger XXX. */
u_int p_stops; /* (c) Stop event bitmask. */
u_int p_stype; /* (c) Stop event type. */
char p_step; /* (c) Process is stopped. */
u_char p_pfsflags; /* (c) Procfs flags. */
u_int p_ptevents; /* (c) ptrace() event mask. */
struct nlminfo *p_nlminfo; /* (?) Only used by/for lockd. */
struct kaioinfo *p_aioinfo; /* (y) ASYNC I/O info. */
struct thread *p_singlethread;/* (c + j) If single threading this is it */
int p_suspcount; /* (j) Num threads in suspended mode. */
struct thread *p_xthread; /* (c) Trap thread */
int p_boundary_count;/* (j) Num threads at user boundary */
int p_pendingcnt; /* how many signals are pending */
struct itimers *p_itimers; /* (c) POSIX interval timers. */
struct procdesc *p_procdesc; /* (e) Process descriptor, if any. */
u_int p_treeflag; /* (e) P_TREE flags */
int p_pendingexits; /* (c) Count of pending thread exits. */
struct filemon *p_filemon; /* (c) filemon-specific data. */
/* End area that is zeroed on creation. */
#define p_endzero p_magic
/* The following fields are all copied upon creation in fork. */
#define p_startcopy p_endzero
u_int p_magic; /* (b) Magic number. */
int p_osrel; /* (x) osreldate for the
binary (from ELF note, if any) */
char p_comm[MAXCOMLEN + 1]; /* (x) Process name. */
struct sysentvec *p_sysent; /* (b) Syscall dispatch info. */
struct pargs *p_args; /* (c) Process arguments. */
rlim_t p_cpulimit; /* (c) Current CPU limit in seconds. */
signed char p_nice; /* (c) Process "nice" value. */
int p_fibnum; /* in this routing domain XXX MRT */
pid_t p_reapsubtree; /* (e) Pid of the direct child of the
reaper which spawned
our subtree. */
uint16_t p_elf_machine; /* (x) ELF machine type */
uint64_t p_elf_flags; /* (x) ELF flags */
/* End area that is copied on creation. */
#define p_endcopy p_xexit
u_int p_xexit; /* (c) Exit code. */
u_int p_xsig; /* (c) Stop/kill sig. */
struct pgrp *p_pgrp; /* (c + e) Pointer to process group. */
struct knlist *p_klist; /* (c) Knotes attached to this proc. */
int p_numthreads; /* (c) Number of threads. */
struct mdproc p_md; /* Any machine-dependent fields. */
struct callout p_itcallout; /* (h + c) Interval timer callout. */
u_short p_acflag; /* (c) Accounting flags. */
struct proc *p_peers; /* (r) */
struct proc *p_leader; /* (b) */
void *p_emuldata; /* (c) Emulator state data. */
struct label *p_label; /* (*) Proc (not subject) MAC label. */
STAILQ_HEAD(, ktr_request) p_ktr; /* (o) KTR event queue. */
LIST_HEAD(, mqueue_notifier) p_mqnotifier; /* (c) mqueue notifiers.*/
struct kdtrace_proc *p_dtrace; /* (*) DTrace-specific data. */
struct cv p_pwait; /* (*) wait cv for exit/exec. */
struct cv p_dbgwait; /* (*) wait cv for debugger attach
after fork. */
uint64_t p_prev_runtime; /* (c) Resource usage accounting. */
struct racct *p_racct; /* (b) Resource accounting. */
int p_throttled; /* (c) Flag for racct pcpu throttling */
struct vm_domain_policy p_vm_dom_policy; /* (c) process default VM domain, or -1 */
/*
* An orphan is the child that has beed re-parented to the
* debugger as a result of attaching to it. Need to keep
* track of them for parent to be able to collect the exit
* status of what used to be children.
*/
LIST_ENTRY(proc) p_orphan; /* (e) List of orphan processes. */
LIST_HEAD(, proc) p_orphans; /* (e) Pointer to list of orphans. */
};
#define p_session p_pgrp->pg_session
#define p_pgid p_pgrp->pg_id
#define NOCPU (-1) /* For when we aren't on a CPU. */
#define NOCPU_OLD (255)
#define MAXCPU_OLD (254)
#define PROC_SLOCK(p) mtx_lock_spin(&(p)->p_slock)
#define PROC_SUNLOCK(p) mtx_unlock_spin(&(p)->p_slock)
#define PROC_SLOCK_ASSERT(p, type) mtx_assert(&(p)->p_slock, (type))
#define PROC_STATLOCK(p) mtx_lock_spin(&(p)->p_statmtx)
#define PROC_STATUNLOCK(p) mtx_unlock_spin(&(p)->p_statmtx)
#define PROC_STATLOCK_ASSERT(p, type) mtx_assert(&(p)->p_statmtx, (type))
#define PROC_ITIMLOCK(p) mtx_lock_spin(&(p)->p_itimmtx)
#define PROC_ITIMUNLOCK(p) mtx_unlock_spin(&(p)->p_itimmtx)
#define PROC_ITIMLOCK_ASSERT(p, type) mtx_assert(&(p)->p_itimmtx, (type))
#define PROC_PROFLOCK(p) mtx_lock_spin(&(p)->p_profmtx)
#define PROC_PROFUNLOCK(p) mtx_unlock_spin(&(p)->p_profmtx)
#define PROC_PROFLOCK_ASSERT(p, type) mtx_assert(&(p)->p_profmtx, (type))
/* These flags are kept in p_flag. */
#define P_ADVLOCK 0x00001 /* Process may hold a POSIX advisory lock. */
#define P_CONTROLT 0x00002 /* Has a controlling terminal. */
#define P_KPROC 0x00004 /* Kernel process. */
#define P_UNUSED3 0x00008 /* --available-- */
#define P_PPWAIT 0x00010 /* Parent is waiting for child to exec/exit. */
#define P_PROFIL 0x00020 /* Has started profiling. */
#define P_STOPPROF 0x00040 /* Has thread requesting to stop profiling. */
#define P_HADTHREADS 0x00080 /* Has had threads (no cleanup shortcuts) */
#define P_SUGID 0x00100 /* Had set id privileges since last exec. */
#define P_SYSTEM 0x00200 /* System proc: no sigs, stats or swapping. */
#define P_SINGLE_EXIT 0x00400 /* Threads suspending should exit, not wait. */
#define P_TRACED 0x00800 /* Debugged process being traced. */
#define P_WAITED 0x01000 /* Someone is waiting for us. */
#define P_WEXIT 0x02000 /* Working on exiting. */
#define P_EXEC 0x04000 /* Process called exec. */
#define P_WKILLED 0x08000 /* Killed, go to kernel/user boundary ASAP. */
#define P_CONTINUED 0x10000 /* Proc has continued from a stopped state. */
#define P_STOPPED_SIG 0x20000 /* Stopped due to SIGSTOP/SIGTSTP. */
#define P_STOPPED_TRACE 0x40000 /* Stopped because of tracing. */
#define P_STOPPED_SINGLE 0x80000 /* Only 1 thread can continue (not to user). */
#define P_PROTECTED 0x100000 /* Do not kill on memory overcommit. */
#define P_SIGEVENT 0x200000 /* Process pending signals changed. */
#define P_SINGLE_BOUNDARY 0x400000 /* Threads should suspend at user boundary. */
#define P_HWPMC 0x800000 /* Process is using HWPMCs */
#define P_JAILED 0x1000000 /* Process is in jail. */
#define P_TOTAL_STOP 0x2000000 /* Stopped in stop_all_proc. */
#define P_INEXEC 0x4000000 /* Process is in execve(). */
#define P_STATCHILD 0x8000000 /* Child process stopped or exited. */
#define P_INMEM 0x10000000 /* Loaded into memory. */
#define P_SWAPPINGOUT 0x20000000 /* Process is being swapped out. */
#define P_SWAPPINGIN 0x40000000 /* Process is being swapped in. */
#define P_PPTRACE 0x80000000 /* PT_TRACEME by vforked child. */
#define P_STOPPED (P_STOPPED_SIG|P_STOPPED_SINGLE|P_STOPPED_TRACE)
#define P_SHOULDSTOP(p) ((p)->p_flag & P_STOPPED)
#define P_KILLED(p) ((p)->p_flag & P_WKILLED)
/* These flags are kept in p_flag2. */
#define P2_INHERIT_PROTECTED 0x00000001 /* New children get P_PROTECTED. */
#define P2_NOTRACE 0x00000002 /* No ptrace(2) attach or coredumps. */
#define P2_NOTRACE_EXEC 0x00000004 /* Keep P2_NOPTRACE on exec(2). */
#define P2_AST_SU 0x00000008 /* Handles SU ast for kthreads. */
#define P2_PTRACE_FSTP 0x00000010 /* SIGSTOP from PT_ATTACH not yet handled. */
#define P2_TRAPCAP 0x00000020 /* SIGTRAP on ENOTCAPABLE */
/* Flags protected by proctree_lock, kept in p_treeflags. */
#define P_TREE_ORPHANED 0x00000001 /* Reparented, on orphan list */
#define P_TREE_FIRST_ORPHAN 0x00000002 /* First element of orphan
list */
#define P_TREE_REAPER 0x00000004 /* Reaper of subtree */
/*
* These were process status values (p_stat), now they are only used in
* legacy conversion code.
*/
#define SIDL 1 /* Process being created by fork. */
#define SRUN 2 /* Currently runnable. */
#define SSLEEP 3 /* Sleeping on an address. */
#define SSTOP 4 /* Process debugging or suspension. */
#define SZOMB 5 /* Awaiting collection by parent. */
#define SWAIT 6 /* Waiting for interrupt. */
#define SLOCK 7 /* Blocked on a lock. */
#define P_MAGIC 0xbeefface
#ifdef _KERNEL
/* Types and flags for mi_switch(). */
#define SW_TYPE_MASK 0xff /* First 8 bits are switch type */
#define SWT_NONE 0 /* Unspecified switch. */
#define SWT_PREEMPT 1 /* Switching due to preemption. */
#define SWT_OWEPREEMPT 2 /* Switching due to owepreempt. */
#define SWT_TURNSTILE 3 /* Turnstile contention. */
#define SWT_SLEEPQ 4 /* Sleepq wait. */
#define SWT_SLEEPQTIMO 5 /* Sleepq timeout wait. */
#define SWT_RELINQUISH 6 /* yield call. */
#define SWT_NEEDRESCHED 7 /* NEEDRESCHED was set. */
#define SWT_IDLE 8 /* Switching from the idle thread. */
#define SWT_IWAIT 9 /* Waiting for interrupts. */
#define SWT_SUSPEND 10 /* Thread suspended. */
#define SWT_REMOTEPREEMPT 11 /* Remote processor preempted. */
#define SWT_REMOTEWAKEIDLE 12 /* Remote processor preempted idle. */
#define SWT_COUNT 13 /* Number of switch types. */
/* Flags */
#define SW_VOL 0x0100 /* Voluntary switch. */
#define SW_INVOL 0x0200 /* Involuntary switch. */
#define SW_PREEMPT 0x0400 /* The invol switch is a preemption */
/* How values for thread_single(). */
#define SINGLE_NO_EXIT 0
#define SINGLE_EXIT 1
#define SINGLE_BOUNDARY 2
#define SINGLE_ALLPROC 3
#ifdef MALLOC_DECLARE
MALLOC_DECLARE(M_PARGS);
MALLOC_DECLARE(M_PGRP);
MALLOC_DECLARE(M_SESSION);
MALLOC_DECLARE(M_SUBPROC);
#endif
#define FOREACH_PROC_IN_SYSTEM(p) \
LIST_FOREACH((p), &allproc, p_list)
#define FOREACH_THREAD_IN_PROC(p, td) \
TAILQ_FOREACH((td), &(p)->p_threads, td_plist)
#define FIRST_THREAD_IN_PROC(p) TAILQ_FIRST(&(p)->p_threads)
/*
* We use process IDs <= pid_max <= PID_MAX; PID_MAX + 1 must also fit
* in a pid_t, as it is used to represent "no process group".
*/
#define PID_MAX 99999
#define NO_PID 100000
extern pid_t pid_max;
#define SESS_LEADER(p) ((p)->p_session->s_leader == (p))
#define STOPEVENT(p, e, v) do { \
WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL, \
"checking stopevent %d", (e)); \
if ((p)->p_stops & (e)) { \
PROC_LOCK(p); \
stopevent((p), (e), (v)); \
PROC_UNLOCK(p); \
} \
} while (0)
#define _STOPEVENT(p, e, v) do { \
PROC_LOCK_ASSERT(p, MA_OWNED); \
WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, &p->p_mtx.lock_object, \
"checking stopevent %d", (e)); \
if ((p)->p_stops & (e)) \
stopevent((p), (e), (v)); \
} while (0)
/* Lock and unlock a process. */
#define PROC_LOCK(p) mtx_lock(&(p)->p_mtx)
#define PROC_TRYLOCK(p) mtx_trylock(&(p)->p_mtx)
#define PROC_UNLOCK(p) mtx_unlock(&(p)->p_mtx)
#define PROC_LOCKED(p) mtx_owned(&(p)->p_mtx)
#define PROC_LOCK_ASSERT(p, type) mtx_assert(&(p)->p_mtx, (type))
/* Lock and unlock a process group. */
#define PGRP_LOCK(pg) mtx_lock(&(pg)->pg_mtx)
#define PGRP_UNLOCK(pg) mtx_unlock(&(pg)->pg_mtx)
#define PGRP_LOCKED(pg) mtx_owned(&(pg)->pg_mtx)
#define PGRP_LOCK_ASSERT(pg, type) mtx_assert(&(pg)->pg_mtx, (type))
#define PGRP_LOCK_PGSIGNAL(pg) do { \
if ((pg) != NULL) \
PGRP_LOCK(pg); \
} while (0)
#define PGRP_UNLOCK_PGSIGNAL(pg) do { \
if ((pg) != NULL) \
PGRP_UNLOCK(pg); \
} while (0)
/* Lock and unlock a session. */
#define SESS_LOCK(s) mtx_lock(&(s)->s_mtx)
#define SESS_UNLOCK(s) mtx_unlock(&(s)->s_mtx)
#define SESS_LOCKED(s) mtx_owned(&(s)->s_mtx)
#define SESS_LOCK_ASSERT(s, type) mtx_assert(&(s)->s_mtx, (type))
/*
* Non-zero p_lock ensures that:
* - exit1() is not performed until p_lock reaches zero;
* - the process' threads stack are not swapped out if they are currently
* not (P_INMEM).
*
* PHOLD() asserts that the process (except the current process) is
* not exiting, increments p_lock and swaps threads stacks into memory,
* if needed.
* _PHOLD() is same as PHOLD(), it takes the process locked.
* _PHOLD_LITE() also takes the process locked, but comparing with
* _PHOLD(), it only guarantees that exit1() is not executed,
* faultin() is not called.
*/
#define PHOLD(p) do { \
PROC_LOCK(p); \
_PHOLD(p); \
PROC_UNLOCK(p); \
} while (0)
#define _PHOLD(p) do { \
PROC_LOCK_ASSERT((p), MA_OWNED); \
KASSERT(!((p)->p_flag & P_WEXIT) || (p) == curproc, \
("PHOLD of exiting process %p", p)); \
(p)->p_lock++; \
if (((p)->p_flag & P_INMEM) == 0) \
faultin((p)); \
} while (0)
#define _PHOLD_LITE(p) do { \
PROC_LOCK_ASSERT((p), MA_OWNED); \
KASSERT(!((p)->p_flag & P_WEXIT) || (p) == curproc, \
("PHOLD of exiting process %p", p)); \
(p)->p_lock++; \
} while (0)
#define PROC_ASSERT_HELD(p) do { \
KASSERT((p)->p_lock > 0, ("process %p not held", p)); \
} while (0)
#define PRELE(p) do { \
PROC_LOCK((p)); \
_PRELE((p)); \
PROC_UNLOCK((p)); \
} while (0)
#define _PRELE(p) do { \
PROC_LOCK_ASSERT((p), MA_OWNED); \
PROC_ASSERT_HELD(p); \
(--(p)->p_lock); \
if (((p)->p_flag & P_WEXIT) && (p)->p_lock == 0) \
wakeup(&(p)->p_lock); \
} while (0)
#define PROC_ASSERT_NOT_HELD(p) do { \
KASSERT((p)->p_lock == 0, ("process %p held", p)); \
} while (0)
#define PROC_UPDATE_COW(p) do { \
PROC_LOCK_ASSERT((p), MA_OWNED); \
(p)->p_cowgen++; \
} while (0)
/* Check whether a thread is safe to be swapped out. */
#define thread_safetoswapout(td) ((td)->td_flags & TDF_CANSWAP)
/* Control whether or not it is safe for curthread to sleep. */
#define THREAD_NO_SLEEPING() ((curthread)->td_no_sleeping++)
#define THREAD_SLEEPING_OK() ((curthread)->td_no_sleeping--)
#define THREAD_CAN_SLEEP() ((curthread)->td_no_sleeping == 0)
#define PIDHASH(pid) (&pidhashtbl[(pid) & pidhash])
extern LIST_HEAD(pidhashhead, proc) *pidhashtbl;
extern u_long pidhash;
#define TIDHASH(tid) (&tidhashtbl[(tid) & tidhash])
extern LIST_HEAD(tidhashhead, thread) *tidhashtbl;
extern u_long tidhash;
extern struct rwlock tidhash_lock;
#define PGRPHASH(pgid) (&pgrphashtbl[(pgid) & pgrphash])
extern LIST_HEAD(pgrphashhead, pgrp) *pgrphashtbl;
extern u_long pgrphash;
extern struct sx allproc_lock;
extern int allproc_gen;
extern struct sx proctree_lock;
extern struct mtx ppeers_lock;
extern struct proc proc0; /* Process slot for swapper. */
extern struct thread0_storage thread0_st; /* Primary thread in proc0. */
#define thread0 (thread0_st.t0st_thread)
extern struct vmspace vmspace0; /* VM space for proc0. */
extern int hogticks; /* Limit on kernel cpu hogs. */
extern int lastpid;
extern int nprocs, maxproc; /* Current and max number of procs. */
extern int maxprocperuid; /* Max procs per uid. */
extern u_long ps_arg_cache_limit;
LIST_HEAD(proclist, proc);
TAILQ_HEAD(procqueue, proc);
TAILQ_HEAD(threadqueue, thread);
extern struct proclist allproc; /* List of all processes. */
extern struct proclist zombproc; /* List of zombie processes. */
extern struct proc *initproc, *pageproc; /* Process slots for init, pager. */
extern struct uma_zone *proc_zone;
struct proc *pfind(pid_t); /* Find process by id. */
struct proc *pfind_locked(pid_t pid);
struct pgrp *pgfind(pid_t); /* Find process group by id. */
struct proc *zpfind(pid_t); /* Find zombie process by id. */
struct fork_req {
int fr_flags;
int fr_pages;
int *fr_pidp;
struct proc **fr_procp;
int *fr_pd_fd;
int fr_pd_flags;
struct filecaps *fr_pd_fcaps;
};
/*
* pget() flags.
*/
#define PGET_HOLD 0x00001 /* Hold the process. */
#define PGET_CANSEE 0x00002 /* Check against p_cansee(). */
#define PGET_CANDEBUG 0x00004 /* Check against p_candebug(). */
#define PGET_ISCURRENT 0x00008 /* Check that the found process is current. */
#define PGET_NOTWEXIT 0x00010 /* Check that the process is not in P_WEXIT. */
#define PGET_NOTINEXEC 0x00020 /* Check that the process is not in P_INEXEC. */
#define PGET_NOTID 0x00040 /* Do not assume tid if pid > PID_MAX. */
#define PGET_WANTREAD (PGET_HOLD | PGET_CANDEBUG | PGET_NOTWEXIT)
int pget(pid_t pid, int flags, struct proc **pp);
void ast(struct trapframe *framep);
struct thread *choosethread(void);
int cr_cansee(struct ucred *u1, struct ucred *u2);
int cr_canseesocket(struct ucred *cred, struct socket *so);
int cr_canseeothergids(struct ucred *u1, struct ucred *u2);
int cr_canseeotheruids(struct ucred *u1, struct ucred *u2);
int cr_canseejailproc(struct ucred *u1, struct ucred *u2);
int cr_cansignal(struct ucred *cred, struct proc *proc, int signum);
int enterpgrp(struct proc *p, pid_t pgid, struct pgrp *pgrp,
struct session *sess);
int enterthispgrp(struct proc *p, struct pgrp *pgrp);
void faultin(struct proc *p);
void fixjobc(struct proc *p, struct pgrp *pgrp, int entering);
int fork1(struct thread *, struct fork_req *);
void fork_exit(void (*)(void *, struct trapframe *), void *,
struct trapframe *);
void fork_return(struct thread *, struct trapframe *);
int inferior(struct proc *p);
void kern_yield(int);
void kick_proc0(void);
void killjobc(void);
int leavepgrp(struct proc *p);
int maybe_preempt(struct thread *td);
void maybe_yield(void);
void mi_switch(int flags, struct thread *newtd);
int p_candebug(struct thread *td, struct proc *p);
int p_cansee(struct thread *td, struct proc *p);
int p_cansched(struct thread *td, struct proc *p);
int p_cansignal(struct thread *td, struct proc *p, int signum);
int p_canwait(struct thread *td, struct proc *p);
struct pargs *pargs_alloc(int len);
void pargs_drop(struct pargs *pa);
void pargs_hold(struct pargs *pa);
int proc_getargv(struct thread *td, struct proc *p, struct sbuf *sb);
int proc_getauxv(struct thread *td, struct proc *p, struct sbuf *sb);
int proc_getenvv(struct thread *td, struct proc *p, struct sbuf *sb);
void procinit(void);
void proc_linkup0(struct proc *p, struct thread *td);
void proc_linkup(struct proc *p, struct thread *td);
struct proc *proc_realparent(struct proc *child);
void proc_reap(struct thread *td, struct proc *p, int *status, int options);
void proc_reparent(struct proc *child, struct proc *newparent);
void proc_set_traced(struct proc *p, bool stop);
struct pstats *pstats_alloc(void);
void pstats_fork(struct pstats *src, struct pstats *dst);
void pstats_free(struct pstats *ps);
void reaper_abandon_children(struct proc *p, bool exiting);
int securelevel_ge(struct ucred *cr, int level);
int securelevel_gt(struct ucred *cr, int level);
void sess_hold(struct session *);
void sess_release(struct session *);
int setrunnable(struct thread *);
void setsugid(struct proc *p);
int should_yield(void);
int sigonstack(size_t sp);
void stopevent(struct proc *, u_int, u_int);
struct thread *tdfind(lwpid_t, pid_t);
void threadinit(void);
void tidhash_add(struct thread *);
void tidhash_remove(struct thread *);
void cpu_idle(int);
int cpu_idle_wakeup(int);
extern void (*cpu_idle_hook)(sbintime_t); /* Hook to machdep CPU idler. */
void cpu_switch(struct thread *, struct thread *, struct mtx *);
void cpu_throw(struct thread *, struct thread *) __dead2;
void unsleep(struct thread *);
void userret(struct thread *, struct trapframe *);
void cpu_exit(struct thread *);
void exit1(struct thread *, int, int) __dead2;
void cpu_copy_thread(struct thread *td, struct thread *td0);
int cpu_fetch_syscall_args(struct thread *td);
void cpu_fork(struct thread *, struct proc *, struct thread *, int);
void cpu_fork_kthread_handler(struct thread *, void (*)(void *), void *);
void cpu_set_syscall_retval(struct thread *, int);
void cpu_set_upcall(struct thread *, void (*)(void *), void *,
stack_t *);
int cpu_set_user_tls(struct thread *, void *tls_base);
void cpu_thread_alloc(struct thread *);
void cpu_thread_clean(struct thread *);
void cpu_thread_exit(struct thread *);
void cpu_thread_free(struct thread *);
void cpu_thread_swapin(struct thread *);
void cpu_thread_swapout(struct thread *);
struct thread *thread_alloc(int pages);
int thread_alloc_stack(struct thread *, int pages);
void thread_cow_get_proc(struct thread *newtd, struct proc *p);
void thread_cow_get(struct thread *newtd, struct thread *td);
void thread_cow_free(struct thread *td);
void thread_cow_update(struct thread *td);
int thread_create(struct thread *td, struct rtprio *rtp,
int (*initialize_thread)(struct thread *, void *), void *thunk);
void thread_exit(void) __dead2;
void thread_free(struct thread *td);
void thread_link(struct thread *td, struct proc *p);
void thread_reap(void);
int thread_single(struct proc *p, int how);
void thread_single_end(struct proc *p, int how);
void thread_stash(struct thread *td);
void thread_stopped(struct proc *p);
void childproc_stopped(struct proc *child, int reason);
void childproc_continued(struct proc *child);
void childproc_exited(struct proc *child);
int thread_suspend_check(int how);
bool thread_suspend_check_needed(void);
void thread_suspend_switch(struct thread *, struct proc *p);
void thread_suspend_one(struct thread *td);
void thread_unlink(struct thread *td);
void thread_unsuspend(struct proc *p);
void thread_wait(struct proc *p);
struct thread *thread_find(struct proc *p, lwpid_t tid);
void stop_all_proc(void);
void resume_all_proc(void);
static __inline int
curthread_pflags_set(int flags)
{
struct thread *td;
int save;
td = curthread;
save = ~flags | (td->td_pflags & flags);
td->td_pflags |= flags;
return (save);
}
static __inline void
curthread_pflags_restore(int save)
{
curthread->td_pflags &= save;
}
static __inline __pure2 struct td_sched *
td_get_sched(struct thread *td)
{
return ((struct td_sched *)&td[1]);
}
extern void (*softdep_ast_cleanup)(struct thread *);
static __inline void
td_softdep_cleanup(struct thread *td)
{
if (td->td_su != NULL && softdep_ast_cleanup != NULL)
softdep_ast_cleanup(td);
}
#endif /* _KERNEL */
#endif /* !_SYS_PROC_H_ */
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